Thanks for the video, I've got a set of GT40s that I'm about to rework. I bought a Trick Flow spring kit, ( p/n TFS-2500100) specifically made for the GT40 heads, from Summit, that I'm to include. I can't believe that I was lucky enough to find the kit in stock, so I snapped it up. As you mentioned, I've also noticed the pitting issue on the original stainless valves, especially bad on the exhaust valves. I'm glad that you're addressing this in the video. As an FYI, (for whoever might give a shit), these heads came on a Ford Racing crate engine that I bought as a 5.0 "Cobra" long block back in 1994. The heads came with OE rockers, so I ditched them for a set of Ford Racing 1.7 ratio roller rockers, the same type of pedestal mount rockers that came on the 93-94 Mustang Cobra. (Ford should have included them in my opinion since it was hawked as a "Cobra" engine in the catalog.) With the original B-303 camshaft, the 1.7s gave me a lift of .512 inches without any issues with coil bind on the OE springs or piston interference. I use the the FelPro, (p/n 1011-2) head gaskets, they don't cost a fortune and never had a problem with them; they're similar to the OE Ford gaskets, maybe a step ahead. The engine went into a 67 Mustang Fastback after doing some research and retrofitting. There wasn't a lot of detailed info on Ford stuff back in 1994, unless you did quite a bit of digging. You could screw up some expensive shit if you weren't careful. It was a learning experience to say the least, but it paid off; the set-up gave me a lot of trouble free miles through the years. Thanks again for the video, I appreciate seeing someone working on a Ford for a change. The whole damned world doesn't drive just Chevys.
0 seconds ago Great video. Gonna basically do the same thing on my 1991 Ford F-150 302, probably a F cam, GT40P’s with springs, lapped in, new valve seals etc. Converting to Cobra upper and lower with headers 36lb injectors matching mass air meter with mass air comversion… wish me luck lol
I just got some gt40p heads out of the junkyard and am wondering about everything needed for me to run them on my foxbody. I would like to refresh the valvetrain but don’t know where to start, I want to be able to run a more aggressive cam at some point in time. Any suggestions for a budget build?
I thought about doing just a..306... With the gt40p worked head.... Believe it or not.. I've actually seen the 302 with board to a 306.... There is a really good 306 cheap budget combo that works well.... I'd like to do hey 347 stroker..., But I don't want to do it with a 90 ho block.... I'm looking for a 68 block... To do a 347 with... But at the moment... I'm just thinking about doing the 90 up lightly to a 306.... And I'm interested in the difference... In the revised. B + E + F+. Cams..., And I've always heard the b cam.... Was good in speed density... But not so good in mass air flow...cars...... But now I'm curious in all the new letter + cams..,. Have you had any experience with the new revised letter..+ cams...
Hay Kris did you check head gasket surface ? I am doing the same to my gt40p heads,i stright edged mine can get .004 to .005 thou on mine . Deciding weather to mill or not. Thanks Jim in Ohio
Thanks for the video, I've got a set of GT40s that I'm about to rework. I bought a Trick Flow spring kit, ( p/n TFS-2500100) specifically made for the GT40 heads, from Summit, that I'm to include. I can't believe that I was lucky enough to find the kit in stock, so I snapped it up. As you mentioned, I've also noticed the pitting issue on the original stainless valves, especially bad on the exhaust valves. I'm glad that you're addressing this in the video.
As an FYI, (for whoever might give a shit), these heads came on a Ford Racing crate engine that I bought as a 5.0 "Cobra" long block back in 1994. The heads came with OE rockers, so I ditched them for a set of Ford Racing 1.7 ratio roller rockers, the same type of pedestal mount rockers that came on the 93-94 Mustang Cobra. (Ford should have included them in my opinion since it was hawked as a "Cobra" engine in the catalog.)
With the original B-303 camshaft, the 1.7s gave me a lift of .512 inches without any issues with coil bind on the OE springs or piston interference. I use the the FelPro, (p/n 1011-2) head gaskets, they don't cost a fortune and never had a problem with them; they're similar to the OE Ford gaskets, maybe a step ahead. The engine went into a 67 Mustang Fastback after doing some research and retrofitting. There wasn't a lot of detailed info on Ford stuff back in 1994, unless you did quite a bit of digging. You could screw up some expensive shit if you weren't careful. It was a learning experience to say the least, but it paid off; the set-up gave me a lot of trouble free miles through the years.
Thanks again for the video, I appreciate seeing someone working on a Ford for a change. The whole damned world doesn't drive just Chevys.
Thank you so.much I just picked some up and this video has saved me so much time and money
Good to hear.
Great video lots of great info, if that’s an explorer engine and you have the throttle body you can flip the throttle linkage and use it they are 65mm
Can you elaborate on this? Why? I’m doing a windsor and explorer injection with p heads
Nice job, great explanation.
Terry Grover sent me over.
I just subscribed.
Nice that you're helping the DIY Home gamer.
Take care, Ed.
No problem.
Thanks for this video...
I'm doing a similar se up right now...
Kris you do a really good job on these videos i wish i could explain things as well as you do on my videos keep it up your right on the ball
Thanks!
Nice work, that thing is going to fire right off. The N-41 cam has great specs!
Yea I’m exited to hear it.
Would you be willing to share the n41 specs ? Thanks
0 seconds ago
Great video. Gonna basically do the same thing on my 1991 Ford F-150 302, probably a F cam, GT40P’s with springs, lapped in, new valve seals etc. Converting to Cobra upper and lower with headers 36lb injectors matching mass air meter with mass air comversion… wish me luck lol
I just got some gt40p heads out of the junkyard and am wondering about everything needed for me to run them on my foxbody. I would like to refresh the valvetrain but don’t know where to start, I want to be able to run a more aggressive cam at some point in time. Any suggestions for a budget build?
Thanks for keeping it down to Earth man.
What's the A340 transmission for?
It came with the 1jz.
I thought about doing just a..306... With the gt40p worked head.... Believe it or not.. I've actually seen the 302 with board to a 306.... There is a really good 306 cheap budget combo that works well.... I'd like to do hey 347 stroker..., But I don't want to do it with a 90 ho block.... I'm looking for a 68 block... To do a 347 with... But at the moment... I'm just thinking about doing the 90 up lightly to a 306.... And I'm interested in the difference... In the revised. B + E + F+. Cams..., And I've always heard the b cam.... Was good in speed density... But not so good in mass air flow...cars...... But now I'm curious in all the new letter + cams..,. Have you had any experience with the new revised letter..+ cams...
I do not have any experience with the new letter cams. I ended up putting a carb on this motor.
You can also pick up some really good tips on dressing up SBF heads on David Vizard's channel here in UA-cam
Thank you for the video. Do you put assembly lube or grease on the valve stems before final assembly?
Yes. Assembly lube.
Thank you for your excellent video.
Mustang in your beginning video sounded like a Toyota Supra turbo 6..cly
Your assumption would be correct😁
Hay Kris did you check head gasket surface ? I am doing the same to my gt40p heads,i stright edged mine can get .004 to .005 thou on mine . Deciding weather to mill or not. Thanks Jim in Ohio
I did check. You should be fine without milling. The gasket is very forgiving.
What does your car run in the 8th/quarter? Rear gears? Thanks
It’s not really setup for drag but it went 12.90 in the quarter. 3.73 gear.
Are these the heads used on the mustang in the video
Sounds like boost
No. That was a 1jz. That car now has a 2jz.
What valve springs and rockers did you use? I’m doing the same build!
Trickflow spring kit and used stock rockers.
Copart my guy. I got a totalled lightning for 2300
This is about as jethro as you can get. But running 12s is as stock as it gets
Yep.
Nitrous to go to the store?? 🤦♀️ here we go 🤯
Some times you need to get milk and eggs in a hurry.😂😂
That's called lapping a valve not a valve job. Also tha straight edge is completely unacceptable. It doesn't even go across all the cylinders.