I have an SM420 behind a GMC 270 running 3.08 gears. I find the combination very drivable just the way it is.

You mention a Saginaw conversion kit from Patrick's. I think you only need that if you are converting from a closed driveline, and your '62 should be an open driveline.


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...