Short answer is that the SM420 was used behind V-8's starting in 1955 through 1967. Difference between a 350 and a 283 or 327 isn't going to matter.

Bellhousing and linkage issues depend on exactly what you are putting it in.


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...