53 you are dealing with two bolt patterns.

First is the difference between the early six and the V-8 where they meet the bellhousing. The '63 and later six is the same as the '55 and later V-8. The '62 and earlier six is completely different.

The second is the crossmember issue. Up through '67 (I'm trusting SteveSr, but that sounds right to me) the pads on pickup bellhousings where it mounts to the crossmember are the same. The '53 and earlier crossmember is different.

So those year bellhousings should fit both your 350 and your transmission. They are not hard to find.


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...