Both transmissions are probably the same SM420 and easily interchangeable. The rear might be an easy swap, but may not and really the only way to know is to compare how they mount.


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...