Using an OD transmission with a 235 in a 55 with a standard rear of 3.90 would be unsatisfactory as you'd end up with and effective 2:73 or so. Too high for the old girl and when up to highway cruising speed you'd still need to stop so now better brakes become important.

My advice would be to stick with a TH350 and stock rear if it's an AT you want. Cheaper to do also.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
More pix on Picturetrail

Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain