Sorry Guys, I have not been keeping up with the group for a while, working two jobs will do that to ya.
The GMC Big Block V6 came in a few sizes, the 305 being the baby of the bunch. as far as power goes, they were built for pulling power, not speed, you wont want one if you want to build a race car. THESE ARE TRUCK ENGINES.
That being said, I will be pulling the 305E out of my 65 1 ton, but I'll be installing either a 401M, HD478 or 351E. I need to dismantle them to see which one is in working order. the 401M is my first choice.
GMC Did build a Diesel version, called the Toro-Flow. they came in either D478, DH478, D351 or D637 or DH637 models, the 637 being the V8.
GMC sold many of the V6s as replacement engines for other trucks, they would provide a KIT with every thing needed, and you just dropped off your old tied truck at the dealership, and they would install a NEW GMC drivetrain, didn't matter if it was a GMC or not, many of the old White 3000 trucks got retrofitted with these, as did older GMCs, Chevy's Ford's Mack's' or what have you. So finding one in a Chevy truck is probable.
Chevy also used the GM Diesel 6V53 in their trucks back in the 60s too.
