I have 3.08 gears under my '55 1st GMC Suburban behind an SM420 4-speed and a basically stock GMC 270.

The rear came from a '73 Chevelle wagon and has the drum brakes from that car and disk in front using '73 Chevelle wagon when I ordered pieces.

It will run 75 but at that speed the steering and suspension don't inspire confidence. I need to rebuild the suspension if I want to run any faster than 70.

My motor is a little bigger and in some ways better than the 235 but I believe a similar combination would work for you.


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...