One of my next Projects is building the Big GMC V6 You can become a supporter of this channel and get extra content as well as win some cool giveaways follow this link / myvintageiron7512
I own one. In my 1967 3/4 ton pickup. Bought it in high school in May 1986 for $100. My Dad and I overhauled the engine and as of today- June 22, 2021, it's still running like a champ. The guy that owned the pickup had let it set for about 8 years and the engine gummed up. He was going to cut the truck up and make a trash hauling trailer when we found it was for sale. Best $100 I've ever spent and at 52 years old, it's still my one and only pickup I've ever owned. That V6 is bullet proof. One easy way to give it a lot more power and economy is put dual exhaust on it. Open'r up and let her breathe!
I am glad I ran across your video series on this engine! Great information about this engine and the big block v6's. They are truly misunderstood. I am restoring a 64 GMC 1 Ton Dually with the 305E V6...so this video should help me tremendously. Can't wait to go through all the videos!
I just got one myself and need to get it running. Glad to see a viewer contesting to the information of the videos. I need to get this running asap haha
When i was a kid, i worked on this farm, they had an old dump truck, with a “V6” emblem, and I always thought it was a typo kind of thing. Thank you for posting and sharing love this kind of stuff
had 1 of these engines..had a hard time getting simple parts.parts guys would say 305 was a v8..i would have to open hood then show them.it survived all a 16 year old could dish out.
Those GMC engines are so cool, look forward to learning more about it. I remember as a kid, seeing V6 emblems on GMC trucks wondering what that was all about..
GMC Made the 305,351,379,401,432, and 478 V6 engines from 1960-1974. The 351-478 were available as Magnum engines. The 351C, E, and M made more torque than the 305. The 266 figure you mentioned was probably Net power ratings. 280 foot pounds was a Gross rating for the 305E in 68. I have a 305E in my 64 GMC, I took a magnum intake and opened the plenum to fit a 4 barrel carb, I also split the exhaust and put on some flowmaster 40 series mufflers. Woke that engine up big time. They are torque monsters. Heavy, little thirsty, but will pull just about anything you can put behind them. May not be as fast, but they will do things better than V8's their size. If you need help finding parts send me a PM. I just rebuilt mine.
Military Chevy hopefully you will see this but I just bought a 65 6500 and I’m still trying to find out what size V6 it has. Will need a water pump for sure and the motor has no power still deciding on wether I want to rebuild after I do more research. Afraid the timing may be wrong as somebody before me put a new cap rotor and points in the truck.
@@wesjwaandrews7524 You can find the cubic inch and series stamped on the passenger side front of the engine right above the water pump area by the cylinder head. There's a little ridge there with it stamped. Timing set at 6 to 8 degrees stock and be sure to do a valve adjustment. .012 intake and .018 exhaust at operating temp. Double check how the plugs wires were routed as I've seen them wrong.
I had one those in my ‘63 GMC half ton factory ordered flat bed. The previous owner told me he hauled a jet engine on the back of it at one time. That motor was bulletproof. Torque from hell.😃
Friend of mine had one of these in his mid sixties GMC truck not sure which size, and being a solid lifter engine it sounded a bit like a slant six, but boy what an amazing stump puller it was-!! The truck had a four speed manual and you didnt even need first gear on take off, it drove away in second gear like it was first, some of this was gearing im sure but I agree this was an amazing hi torque workhorse engine-! Only V engine I ever saw with the spark plugs on the intake side of the head.
I've only ever seen one of those GM V6's in real life. It was in a junk yard near the bottom end of 78th St near Riverview FL. It was in a heavy duty GMC truck. Same junkyard had a 1958 Imperial with a 392Hemi(dual quad). I tried for months to talk the guy out of that Hemi engine, but he didn't want to sell it.
They also made this engine into a "Toroflow " diesil...didn't work out to well. Good as gas engines. I had a 305 in a pickup and a 478Magnum in my 1974 7500 boom truck. Good motors burned a lot of gas. Ford made a 534 v8 and IHC made a 732v8 back in the old days before diesels became popular. They also made a v12 out of these motors 1mpg under load...
My neighbor has a 62 or 63 GMC with the 305 , and he's had it for years. It has so many miles, it actually ate the fuel pump lobe on the camshaft, it's unbelievable. It's still kickin'. My buddy whose a Sophomore in high school has a 63 GMC with the 305 as well, which he's going to fix up and drive. They're cool old motors.
my aunt has a 62 or 63 gmc pickup that came stock with the 305 GMC and 3 on the tree. Even has the V6 badges on the sides of the hood. Been parked in a barn for 25 years.
Love these videos. I purchased a 1966 GMC 3/4 ton pickup a year ago and this is the exact same engine. 115K mi. Not always easy to find parts but this motor is a beast.
Man, what a great idea on building and selling "spec" engines. Not only are you getting a quality built motor, you are getting full documentation of the build! No guess work wether the builder was cutting corners or not. Good luck!
Have you ever saw a 503 GMC? Huge inline 6-cylinder engine used in Fire Trucks. Had a 2-piece block, the crankcase was cast separate than the cylinders. Predated the V6 GMC.
I dont know what your plans are, but back in the day, a buddy of my grandpa's had one of these and he modified the intake so he could put a 4 bbl on it and it really woke it up.
I bought a '65 GMC 4x2 1/2 ton pickup with a 305 V6 from a estate sale for $35. I wish that I would of kept it because it ran and drove, and the body wasn't too bad.
I had one of these in my 1964 3/4 ton 4X4 in high school. It was underpowered and inefficient. I put a larger Holly carb on it which really made it come alive - but worsened the already bad gas mileage. What I really like about that truck was the bulletproof drivetrain. It was originally a snowplow, and really built for work. Wish I still had that truck
I remember driving a1964 retired school bus that had become a church bus back in the early 70's. It is amazing how much pulling power it had. I certainly had fond memories of that 1964 GMC it was a 60 passenger bus with a 4 speed stick. It was neat hearing you talk about that engine.
I have my g-father’s ‘63, 3/4t 4x4, K1500 stepside. Winch in the front, PTO out the rear. It runs so smoothly, love it, but am going to have to do something w/ my carb at some point. Best truck ever w/ this 305E V6😊
My brother who is 10 years older than I am had a 67 Impala SS with a 409 W block which looked identical to the 305 V 6 that was in dads 65 GMC 1 ton truck. I learned how to drive in that old truck when I was like 12 years old in 74 it was a 3 on the tree no power steering and no power breaks and a carburetor What fond memories I have of pumping the gas to make it go and the breaks to get it stopped and using both feet to operate all three pedals at the same time all while double clutching just to shift gears. I would love to see today's kids try and drive something like that. looking forward to hearing this engine run.
You rock Sr. this is the first truck/ standard I every drove as a 13 year old punk. Dad had driven it up from George School Penn. It had bin the yards truck since new at the college. It burned about a quart of oil every 20 miles on the way up to Maine. It put a rod through the side of the block on my 15 birthday coming up the driveway. Glad to see you got yours hands on one 2 rebuild.
They also used that same enging in a diesel configuration , I drove lots of GMC trucks with both the gas and diesel engine setup . Very cool ,it brings back alot of memories from the early 70's .
THANK YOU SO MUCH FOR DOING THIS VIDEO! I had a 64 Chevy pick up and was always jealous that the GMC version of that truck had that engine! No info anywhere on that engine so thank you for doing it.
I used a 72 8500 Chevy 401 v6 dump to build my camp road back when. I revved it out before shifting and got poor gas mileage. I read somewhere the proper way to operate the truck was to shift in the peak torque range, about 1400rpm. Well, my mileage went from 4+ to 5-6, loaded, a huge improvement. Still got her. Nice work here.Also, a side note, supposedly the best chrome vanadian steel is used in the block, for super strength and endurance. Short shift these things!
I'm a BIG BIG V6 fan. I have built my 98 4.3 for my S10 Blazer. I have never heard of these GMC V6 engines! I'm a Chevy fan but I didn't know that GMC built such engines. Now I have to research these suckers!
I've always wanted to see a good build on one of these.I used to drive a old wrecker with a 351 6 in it and it would pull anything.Also the 12's came in a lot of fire trucks as you probably know.
I just bought a 1962 GMC 1000 305 V6 in July. It's originally from Arizona before being sold and transported to the inside of a Florida horse barn. It was stored inside with a 1961 IH Scout 80 and 1957 Chevrolet 3100. I also bought the 61 Scout. My truck needs a starter and since it was delivered I haven't had any keys. You can see it on mu channel videos. Thanks for the video.
My father used to have a '63 GMC pick up with the 305 version of this engine. It pulled some heavy loads easily, though it didn't have any top end power to speak of. A few times people approached him to buy the truck, just for the engine.
when i was a teenager working for neff constructing company i had to resurrect one of these in 351 form and drove the critter(a victim of years of neglect). it resided in a single axle dump that we regularly over loaded and it rarely complained. it would get pissed off on dirt sites but did fine on tarmac. had to add a six blade fan. two speed rear and a top load 4 speed. 65mph top speed(scary until i found out bus tie rod ends would fit it-originals were shot) and a low side that would pull stumps with enough traction. ate fuel at an alarming rate for a 2bbl carb engine but started easily all year long and was quite smooth.very tough engine. unique sounding also.
It would be fun, but expensive, to try to hot rod one of these. Just for fun and somethin' different. Maybe just throw a cheap Chinese turbo on it, blowin' thru a carb.
very cool i love the older/obscure stuff! please keep it up. maybe you could do a ford y-block, or mopar poly build at some point. keep doing what you're doing, it's great to see engine videos from someone who actually knows what they are talking about!
Those are cool engines . 15 years ago I rebuilt a 478 , the pistons looked like buckets . There are a couple of videos on youtube with the 702 V12 , cool videos .
I would say if this engine could be updated with a gear drive timing set, roller lifters, fuel injection and electronic ignition it could easily reach 1 million miles as long as it was half way maintained
I first saw one of these engines in the mid eighties in a pickup at a junk yard and one of the heads was off, I remember thinking that the pistons were bigger than the pistons in my 396, lol. I have told people about it and they think I was smoking something, lol. Looking forward to the build!!
I'm so glad I found this video, I have a 1963 GMC long bed with a 305 V6 4 speed on the floor with the plaid valve covers (Scotsman special) as I've been told it was called, I drove it in high school and I can tell you that these engines are bullet proof! got the truck for my 14th bd and I've had it ever since
i know theres not a lot you can do to a flathead ford v8 to make it a more practical daily driver, but i'd like to see someone do a piece on an early flathead v8
I thought I knew about all the general motors engines out there including the Detroit diesel engine, I guess your never too old to learn more, thanks for the lesson!
I had a 67 gmc truck with the 305 as a teenager back in the 90s. Was a fun torque truck. Used to pull stumps in granny gear. Only to have Napa give me the wrong oil filter and mine locked up.
Another comment on my '63 GMC 305E V6, it came from the line with 'plaid' valve covers. The story on these were that they were pulled off the line, modified and blue printed, and put back on the line. The 'plaid' valve covers were to let future tech service know that this motor was a transition motor. Again, a real stump puller!
Yeah, points distributors are junk. Until you have a module go out on you in the middle of nowhere. Then you'll wish you had something simple you can fix with a screw driver and a little file or some sandpaper. Had a 351 in a 60's 3/4 ton pickup. Really regret selling that truck. Thanks for doing this build. Very cool.
All the older GM V8's had that distributor window for setting dwell, made point swaps a dream as the points came preset close enough to run all ya had to do was hook up a dwell meter and a do a quick setting to 30 degrees or whatever and you were done, no feeler guages needed.
Really cool engines, I have always been fascinated by those. My father bought a GMC C30 Quadcab roller a few years ago that has a V6 badge on the fender.
Back in 1976 I bought a 1967 GMC 3/4 ton 305 V-6 with auto trans. It had no PS or PB or A/C. Kind of a brute in a small parking lot (hard to steer). The body was in perfect shape but the paint was not good. Kind of a dull gray and no shine whatsoever. Kind of a love/hate relationship as I remember. The wife hated it. I kept it only about 2 years and to be honest I didn't miss the truck. It belonged on a farm somewhere not as a daily driver for a young family with a baby .
Hall-Scott built a 1081 ci six inline - common in the 1940's. I-H built some serious six's also. All kinds of trucks ran serious gas engines back in the day when gasoline was $0.10/gal. But a lot of truck companies ran "commercial gas" which was lower octane than Regular ... So most were 7 1/2 to 1 compression ratio. None are cost effective to run on modern gasoline at today's prices. But maybe of LPG or CNG :D All these engines run best at 2,500~2,800 RPM. No real point in winding them as that is just higher fuel consumption. You want to go faster, shift :D
I am a huge fan of your videos and I had not seen anyone else doing a GMC V6 on UA-cam. this is a very good interesting project. all your builds are very interesting but this one is indeed very special. keep on making these, I really appreciate this!
I would imagine that aftermarket support for these engines are almost non-existant. Would love to see a Holley four-barrel blow through carb with twin turbo on one of those 478's. That thing would probably absolutely rip.
60 degree, smooth. Interesting engine designed from the ground up as a V6, opposed to those early rough running 90 degree Buick v6’s. I think a modern engine equivalent is perhaps the Ford v10. Long lived, cheaper than diesels, but gulp fuel.
had a 351 v6 in a 1970 gmc 5500. Had more snot than a 350md motor the chevy mediums did. Those didnt need a big carb as with the bore and long stroke there was pleny of time to gulp air from a 1 or 2 barrel
FYI, GMC circa 1953 made an INLINE 6 of 505 ci, and a very rare 707 ci inline 6. Mack also had a 707 gas inline 6, but I believe the largest gas I-6 was by Hall-Scott, at around 1000 ci, used in fire trucks (and boats, Im sure).
..I remember the first time I ever saw one of these engines..it was on the floor of a shop, like this...I asked the shop owner what it was...I thought it was a Chevy 348 or 409 when I first spotted it, was real excited when I saw it, I was really into the 348-409, and the shape of the valve covers is what caught my attention...then I saw the GMC on the valve covers...shop owner responded; "That's a GMC truck V6"...I looked at it a little closer, and said:"I'll be darned..it IS a V6, isn't it?...never seen one before"....
I was unaware of this family of engines, but I am now very interested! This sounds right up my alley; it's unusual, it's different, and it's strong! Looking forward to this series. :D Merry Christmas to you! :)
I had one it was a 305e and a 1 barrel stromberg ww1 carb you can’t tear them up that easy it was in a 1965 gmc 1/2 ton 3 on the tree that engine would run and with dual exhaust on it , it sounded like a lycombing air craft engine I wish I had the truck back
I drove a 1/2 ton 62 GMC with a 305 and it was a fairly powerful engine but it was a gas hog and that was in the early 60s and it would not get 10 MPH. It was tough but you had to keep a sharp eye out for gas pumps.
I own one. In my 1967 3/4 ton pickup. Bought it in high school in May 1986 for $100. My Dad and I overhauled the engine and as of today- June 22, 2021, it's still running like a champ. The guy that owned the pickup had let it set for about 8 years and the engine gummed up. He was going to cut the truck up and make a trash hauling trailer when we found it was for sale. Best $100 I've ever spent and at 52 years old, it's still my one and only pickup I've ever owned. That V6 is bullet proof. One easy way to give it a lot more power and economy is put dual exhaust on it. Open'r up and let her breathe!
I am glad I ran across your video series on this engine! Great information about this engine and the big block v6's. They are truly misunderstood. I am restoring a 64 GMC 1 Ton Dually with the 305E V6...so this video should help me tremendously. Can't wait to go through all the videos!
I just got one myself and need to get it running. Glad to see a viewer contesting to the information of the videos. I need to get this running asap haha
When i was a kid, i worked on this farm, they had an old dump truck, with a “V6” emblem, and I always thought it was a typo kind of thing. Thank you for posting and sharing love this kind of stuff
had 1 of these engines..had a hard time getting simple parts.parts guys would say 305 was a v8..i would have to open hood then show them.it survived all a 16 year old could dish out.
Those GMC engines are so cool, look forward to learning more about it. I remember as a kid, seeing V6 emblems on GMC trucks wondering what that was all about..
GMC Made the 305,351,379,401,432, and 478 V6 engines from 1960-1974. The 351-478 were available as Magnum engines. The 351C, E, and M made more torque than the 305. The 266 figure you mentioned was probably Net power ratings. 280 foot pounds was a Gross rating for the 305E in 68. I have a 305E in my 64 GMC, I took a magnum intake and opened the plenum to fit a 4 barrel carb, I also split the exhaust and put on some flowmaster 40 series mufflers. Woke that engine up big time. They are torque monsters. Heavy, little thirsty, but will pull just about anything you can put behind them. May not be as fast, but they will do things better than V8's their size. If you need help finding parts send me a PM. I just rebuilt mine.
Where can I contact you easier. Trying to find good pages of guys that have the 305e v6. I have a 67 GMC pickup with 60,000 original miles.
Military Chevy hopefully you will see this but I just bought a 65 6500 and I’m still trying to find out what size V6 it has. Will need a water pump for sure and the motor has no power still deciding on wether I want to rebuild after I do more research. Afraid the timing may be wrong as somebody before me put a new cap rotor and points in the truck.
@@wesjwaandrews7524 You can find the cubic inch and series stamped on the passenger side front of the engine right above the water pump area by the cylinder head. There's a little ridge there with it stamped. Timing set at 6 to 8 degrees stock and be sure to do a valve adjustment. .012 intake and .018 exhaust at operating temp. Double check how the plugs wires were routed as I've seen them wrong.
cool old stuff that was back when GMC had its own line of truck engines
Nothing different from Pontiac, Buick, Olds, Caddilac.
I had one those in my ‘63 GMC half ton factory ordered flat bed. The previous owner told me he hauled a jet engine on the back of it at one time. That motor was bulletproof. Torque from hell.😃
Thank you for doing this series! I have this motor in my 62 GMC, and was very happy to see you did a complete tear down and rebuild of it.
I just got my self a 62 gmc last night . What did you do with yours .?
@@alecxixfernandez5212 Still have it, was a running truck when I bought it and I still drive it with this exact original motor in it. Runs great.
Friend of mine had one of these in his mid sixties GMC truck not sure which size, and being a solid lifter engine it sounded a bit like a slant six, but boy what an amazing stump puller it was-!! The truck had a four speed manual and you didnt even need first gear on take off, it drove away in second gear like it was first, some of this was gearing im sure but I agree this was an amazing hi torque workhorse engine-! Only V engine I ever saw with the spark plugs on the intake side of the head.
I remember me and my dad in a junk yard and saying...that's a good engine...never forget that
I've only ever seen one of those GM V6's in real life. It was in a junk yard near the bottom end of 78th St near Riverview FL. It was in a heavy duty GMC truck.
Same junkyard had a 1958 Imperial with a 392Hemi(dual quad). I tried for months to talk the guy out of that Hemi engine, but he didn't want to sell it.
When I was a kid I actually hauled a running hemi to scrap .
Back then they were worth almost nothing.
They also made this engine into a "Toroflow " diesil...didn't work out to well. Good as gas engines. I had a 305 in a pickup and a 478Magnum in my 1974 7500 boom truck. Good motors burned a lot of gas. Ford made a 534 v8 and IHC made a 732v8 back in the old days before diesels became popular. They also made a v12 out of these motors 1mpg under load...
Thanks for posting! Brings back happy memories of a 305 that I serviced back in the early 70's!
Great engine choice! I'm looking forward to seeing the build.
My neighbor has a 62 or 63 GMC with the 305 , and he's had it for years. It has so many miles, it actually ate the fuel pump lobe on the camshaft, it's unbelievable. It's still kickin'. My buddy whose a Sophomore in high school has a 63 GMC with the 305 as well, which he's going to fix up and drive. They're cool old motors.
Yep they jest keep on running
At 2:13, your dog pee'd on your bottle jack (?) back there.... :D
yea he thinks he owns everything he;s claiming it
If he didn't, he does now...
Mat Helm only in the minds of other dogs
my aunt has a 62 or 63 gmc pickup that came stock with the 305 GMC and 3 on the tree. Even has the V6 badges on the sides of the hood. Been parked in a barn for 25 years.
Get it out and going!
Love these videos. I purchased a 1966 GMC 3/4 ton pickup a year ago and this is the exact same engine. 115K mi.
Not always easy to find parts but this motor is a beast.
Man, what a great idea on building and selling "spec" engines. Not only are you getting a quality built motor, you are getting full documentation of the build! No guess work wether the builder was cutting corners or not. Good luck!
One of my 1960’s Yale G5 forklifts has a 305 still running strong on propane. Just a great workhorse! Loved this whole rebuild series!
My grandfather had a 1970 GMC C60 10 ton dump truck with a 305 V6. It had no problem hauling heavy loads.
Have you ever saw a 503 GMC? Huge inline 6-cylinder engine used in Fire Trucks. Had a 2-piece block, the crankcase was cast separate than the cylinders. Predated the V6 GMC.
Yep big truck monster
I dont know what your plans are, but back in the day, a buddy of my grandpa's had one of these and he modified the intake so he could put a 4 bbl on it and it really woke it up.
I bought a '65 GMC 4x2 1/2 ton pickup with a 305 V6 from a estate sale for $35. I wish that I would of kept it because it ran and drove, and the body wasn't too bad.
My dad has a '65 GMC 3/4 ton with the 305 V6 in it, and I remember it being quite a runner. He is the original owner and still has it.
Wow
I had one of these in my 1964 3/4 ton 4X4 in high school. It was underpowered and inefficient. I put a larger Holly carb on it which really made it come alive - but worsened the already bad gas mileage. What I really like about that truck was the bulletproof drivetrain. It was originally a snowplow, and really built for work. Wish I still had that truck
killer motor, I remember them well!!! worked on the 401??? 406 Puts chev to shame!!! Real torque monsters!!!
Frederick Burns the chevy small blocks werent made for the same purpose as these
I remember driving a1964 retired school bus that had become a church bus back in the early 70's. It is amazing how much pulling power it had. I certainly had fond memories of that 1964 GMC it was a 60 passenger bus with a 4 speed stick. It was neat hearing you talk about that engine.
I have my g-father’s ‘63, 3/4t 4x4, K1500 stepside. Winch in the front, PTO out the rear. It runs so smoothly, love it, but am going to have to do something w/ my carb at some point. Best truck ever w/ this 305E V6😊
I have a 1967 c2500 305e v6 that I'm working on right now, thank you for making these videos a lot of useful information that I gathered :)
your welcome
I had a 1963 GMC CarryAll 4x4 with the 305E V6. A real stump puller... a great vehicle!
My brother who is 10 years older than I am had a 67 Impala SS with a 409 W block which looked identical to the 305 V 6 that was in dads 65 GMC 1 ton truck. I learned how to drive in that old truck when I was like 12 years old in 74 it was a 3 on the tree no power steering and no power breaks and a carburetor What fond memories I have of pumping the gas to make it go and the breaks to get it stopped and using both feet to operate all three pedals at the same time all while double clutching just to shift gears. I would love to see today's kids try and drive something like that.
looking forward to hearing this engine run.
You rock Sr. this is the first truck/ standard I every drove as a 13 year old punk. Dad had driven it up from George School Penn. It had bin the yards truck since new at the college. It burned about a quart of oil every 20 miles on the way up to Maine. It put a rod through the side of the block on my 15 birthday coming up the driveway. Glad to see you got yours hands on one 2 rebuild.
They also used that same enging in a diesel configuration , I drove lots of GMC trucks with both the gas and diesel engine setup . Very cool ,it brings back alot of memories from the early 70's .
THANK YOU SO MUCH FOR DOING THIS VIDEO! I had a 64 Chevy pick up and was always jealous that the GMC version of that truck had that engine! No info anywhere on that engine so thank you for doing it.
I used a 72 8500 Chevy 401 v6 dump to build my camp road back when. I revved it out before shifting and got poor gas mileage. I read somewhere the proper way to operate the truck was to shift in the peak torque range, about 1400rpm. Well, my mileage went from 4+ to 5-6, loaded, a huge improvement. Still got her. Nice work here.Also, a side note, supposedly the best chrome vanadian steel is used in the block, for super strength and endurance. Short shift these things!
I'm a BIG BIG V6 fan. I have built my 98 4.3 for my S10 Blazer. I have never heard of these GMC V6 engines! I'm a Chevy fan but I didn't know that GMC built such engines. Now I have to research these suckers!
ricvis44 the information is lacking on them online
I've always wanted to see a good build on one of these.I used to drive a old wrecker with a 351 6 in it and it would pull anything.Also the 12's came in a lot of fire trucks as you probably know.
I just bought a 1962 GMC 1000 305 V6 in July. It's originally from Arizona before being sold and transported to the inside of a Florida horse barn. It was stored inside with a 1961 IH Scout 80 and 1957 Chevrolet 3100.
I also bought the 61 Scout.
My truck needs a starter and since it was delivered I haven't had any keys. You can see it on mu channel videos. Thanks for the video.
this was a neat engine. my dad had one in a gmc 3/4 ton truck 4x4. it had its own sound.
My father used to have a '63 GMC pick up with the 305 version of this engine. It pulled some heavy loads easily, though it didn't have any top end power to speak of. A few times people approached him to buy the truck, just for the engine.
I might be 4 years late, but thanks for this video. I'm restoring my 64 gmc truck with the 305 and I need to rebuild it.
I had a 66 GMC half-ton pickup with the 351 V6. It had tremendous torque, giving it awesome acceleration through the three-on-the-tree transmission.
when i was a teenager working for neff constructing company i had to resurrect one of these in 351 form and drove the critter(a victim of years of neglect). it resided in a single axle dump that we regularly over loaded and it rarely complained. it would get pissed off on dirt sites but did fine on tarmac. had to add a six blade fan. two speed rear and a top load 4 speed. 65mph top speed(scary until i found out bus tie rod ends would fit it-originals were shot) and a low side that would pull stumps with enough traction. ate fuel at an alarming rate for a 2bbl carb engine but started easily all year long and was quite smooth.very tough engine. unique sounding also.
It would be fun, but expensive, to try to hot rod one of these. Just for fun and somethin' different. Maybe just throw a cheap Chinese turbo on it, blowin' thru a carb.
huh, big block v6...sweet!
That's the perfect description for it! Pretty cool
I can't wait for the next video it's gonna be a great series
Great video, I had a 62 GMC pickup with that engine.....it had some kind of car 4 speed trans in it and was a blast to drive.......
very cool i love the older/obscure stuff! please keep it up. maybe you could do a ford y-block, or mopar poly build at some point. keep doing what you're doing, it's great to see engine videos from someone who actually knows what they are talking about!
Those are cool engines . 15 years ago I rebuilt a 478 , the pistons looked like buckets . There are a couple of videos on youtube with the 702 V12 , cool videos .
I would say if this engine could be updated with a gear drive timing set, roller lifters, fuel injection and electronic ignition it could easily reach 1 million miles as long as it was half way maintained
agreed
Stock as they were I've seen some with over 400,000.
Southern Mechanic why take somthing like this era and flood with all the electronics. defeats it purpose.
I first saw one of these engines in the mid eighties in a pickup at a junk yard and one of the heads was off, I remember thinking that the pistons were bigger than the pistons in my 396, lol. I have told people about it and they think I was smoking something, lol. Looking forward to the build!!
I'm so glad I found this video, I have a 1963 GMC long bed with a 305 V6 4 speed on the floor with the plaid valve covers (Scotsman special) as I've been told it was called, I drove it in high school and I can tell you that these engines are bullet proof! got the truck for my 14th bd and I've had it ever since
Not to mention the oil bath air filter
From an era when work vehicles were built to last.
hallis1 I take reliability over haveing to head studd this or delete that they deffnetly don't build them like they used to
@@strengthstuff7618L35/LU3, LR4 engine, Detroit Diesel 6.2, 6.5.
looking forward to seeing inside it, you are a clever guy
i know theres not a lot you can do to a flathead ford v8 to make it a more practical daily driver, but i'd like to see someone do a piece on an early flathead v8
I thought I knew about all the general motors engines out there including the Detroit diesel engine, I guess your never too old to learn more, thanks for the lesson!
Johnny Martinez lot of gm engines have been cast into the dark sadly
I worked on a 478. The pistons were almost as big as a manhole cover.
I'm looking for a 478 complete with transmission. Send information to woodpecker5778@gmail.com
I had a 1/2 ton 1963 pickup with a 305. Driving it felt nothing like a 63 Chevy Pickup with a 6 or 8.
I had a 67 gmc truck with the 305 as a teenager back in the 90s. Was a fun torque truck. Used to pull stumps in granny gear. Only to have Napa give me the wrong oil filter and mine locked up.
Mine also was ran str8 piped with cherry bombs
Never knew these engines existed, thanks!
Another comment on my '63 GMC 305E V6, it came from the line with 'plaid' valve covers. The story on these were that they were pulled off the line, modified and blue printed, and put back on the line. The 'plaid' valve covers were to let future tech service know that this motor was a transition motor. Again, a real stump puller!
Merry Christmas 🎁🎄
Best gasoline truck engine ever made!
No doubt!
Yeah, points distributors are junk. Until you have a module go out on you in the middle of nowhere. Then you'll wish you had something simple you can fix with a screw driver and a little file or some sandpaper. Had a 351 in a 60's 3/4 ton pickup. Really regret selling that truck. Thanks for doing this build. Very cool.
All the older GM V8's had that distributor window for setting dwell, made point swaps a dream as the points came preset close enough to run all ya had to do was hook up a dwell meter and a do a quick setting to 30 degrees or whatever and you were done, no feeler guages needed.
Really cool engines, I have always been fascinated by those. My father bought a GMC C30 Quadcab roller a few years ago that has a V6 badge on the fender.
That's so cool. I have always been curious about that family of engines.
Looking forward to see the innards of this beast :)
Back in 1976 I bought a 1967 GMC 3/4 ton 305 V-6 with auto trans. It had no PS or PB or A/C. Kind of a brute in a small parking lot (hard to steer). The body was in perfect shape but the paint was not good. Kind of a dull gray and no shine whatsoever. Kind of a love/hate relationship as I remember. The wife hated it. I kept it only about 2 years and to be honest I didn't miss the truck. It belonged on a farm somewhere not as a daily driver for a young family with a baby .
Hall-Scott built a 1081 ci six inline - common in the 1940's. I-H built some serious six's also. All kinds of trucks ran serious gas engines back in the day when gasoline was $0.10/gal. But a lot of truck companies ran "commercial gas" which was lower octane than Regular ... So most were 7 1/2 to 1 compression ratio. None are cost effective to run on modern gasoline at today's prices. But maybe of LPG or CNG :D
All these engines run best at 2,500~2,800 RPM. No real point in winding them as that is just higher fuel consumption. You want to go faster, shift :D
I am a huge fan of your videos and I had not seen anyone else doing a GMC V6 on UA-cam. this is a very good interesting project. all your builds are very interesting but this one is indeed very special. keep on making these, I really appreciate this!
These are neat engines
Love the videos on these unique engines you don't see every day. I'm excited for the next video.
I'm looking forward to this build! Awesome! Thank you!
so happy I found your videos. Im working on my 66 fleetside gmc and Im having some oil pressure problems. Cant wait till the next video.
This engine is awesome. Can't wait to see this build. Love your videos.
I would imagine that aftermarket support for these engines are almost non-existant. Would love to see a Holley four-barrel blow through carb with twin turbo on one of those 478's. That thing would probably absolutely rip.
60 degree, smooth. Interesting engine designed from the ground up as a V6, opposed to those early rough running 90 degree Buick v6’s. I think a modern engine equivalent is perhaps the Ford v10. Long lived, cheaper than diesels, but gulp fuel.
I think you should put a big 4 barrel carb on that thing. Making a sheet metal intake should be no problem for a guy with your skills.
well I sold it several years ago so not gona happen
I'm reworking a Buick V6 "even fire" for my CJ3A. Hopefully some of the info on this build will apply to mine. Thanks for doing it!
Tucker Amidon look up other stuff the buick is different and has a interesting history
Nice!! Never knew about high displacement v6 engines... :-)
had a 351 v6 in a 1970 gmc 5500. Had more snot than a 350md motor the chevy mediums did. Those didnt need a big carb as with the bore and long stroke there was pleny of time to gulp air from a 1 or 2 barrel
what about an International harvester V8?
FYI, GMC circa 1953 made an INLINE 6 of 505 ci, and a very rare 707 ci inline 6. Mack also had a 707 gas inline 6, but I believe the largest gas I-6 was by Hall-Scott, at around 1000 ci, used in fire trucks (and boats, Im sure).
..I remember the first time I ever saw one of these engines..it was on the floor of a shop, like this...I asked the shop owner what it was...I thought it was a Chevy 348 or 409 when I first spotted it, was real excited when I saw it, I was really into the 348-409, and the shape of the valve covers is what caught my attention...then I saw the GMC on the valve covers...shop owner responded; "That's a GMC truck V6"...I looked at it a little closer, and said:"I'll be darned..it IS a V6, isn't it?...never seen one before"....
Thanks for the video on unknown v6 engines.
That's a really awesome engine, I can't wait for the engine build series!
This guys in engine nerd I love it he knows his shit …
I was unaware of this family of engines, but I am now very interested! This sounds right up my alley; it's unusual, it's different, and it's strong! Looking forward to this series. :D
Merry Christmas to you! :)
interesting. I saw a picture of one of these in the gm personal collection but didn't realize it was actually produced.
i love these engines, had one in a 65 gmc 3/4 ton. I regret getting rid of that truck.
I used to own a 61 GMC that had this motor in it. Wish I still had it.
I once had a 61 GMC 1/2 ton with the 305A V-6. One barrel carb and blow by tube (used before PCV).
The local GMC truck dealer in PennYan New York, Martin Tones Garage had a wrecker with one of those V12s in it
in 1983 I drove a 1978 Camaro coupe with a V-6 engine. It was not like a 350, but it ran pretty good.
I had one it was a 305e and a 1 barrel stromberg ww1 carb you can’t tear them up that easy it was in a 1965 gmc 1/2 ton 3 on the tree that engine would run and with dual exhaust on it , it sounded like a lycombing air craft engine I wish I had the truck back
I have never seen one or new they made one.....like the video
I drove a 1/2 ton 62 GMC with a 305 and it was a fairly powerful engine but it was a gas hog and that was in the early 60s and it would not get 10 MPH. It was tough but you had to keep a sharp eye out for gas pumps.