4.57 most likley.

Its possible to find a 4.11 that is an easy swap, just drop out the center section and replace.

Otherwise you're really looking at an axle swap.


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...