That is basically the same rear GM used in 3/4- and 1-ton trucks up through 1972. Some of the automatic trucks had 3.something gearsets in them. You can swap just the carrier fairly easily. That's the approach I'd recommend.

I just made this some comment somewhere else recently, have you asked the question on this or another board? Or did I answer it for someone else too?


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...