Mopar Slant 6 Alternator upgrade 120A!

This video is about one option to upgrade your old alternator on a Slant 6 (and other Mopars) using the stock regulator. You can not use the stock body harness especially if your car uses a factory amp gauge.

[@pancudowny]

When the factory 120A unit failed on my '88 Ramcharger TBI 5.2L... while running a full MSD system... I replaced it with a Trak-Auto rebuild. (

[@101computerman]

Those Nippon Denso alternators are great units. I did this swap on my slant 6 in the summer as I had the old one from my 93 dodge ram diesel as I thought it was the problem it wasn't it was a power relay. anyway, it's got around 350,000 km on it and bearings are still like new. bearing on the old-style alternator were also noisy.

[@neilskiw]

It would be nice to know if you removed material from the FRONT, REAR, or both the F & R of the alternator bracket to accommodate and align the narrow ND alternator.

[@tingleyent2149]

Mostly front with a little off of the rear once it was lined up.

[@fullforce581]

Does the regulator need to be changed out as well

[@tingleyent2149]

Full Force I used the the 70’s factory style electric regulator.

[@JoeyGarcia]

Nice job!!

[@Sir.AdamsVIII]

Stock has only 35 amps? Wow

[@jamesjohnson6728]

I bet that would fry a factory dash in a hurry.

[@JoeyGarcia]

I'm pretty sure he bypasses the ammeter with around 6 gauge wire straight to the battery. I bypass with 10 gauge but planning on upgrading to 6 gauge. I also removed the ammeter too.