Going thru the logistics of putting an S10 T-5 transmission in my 55 2nd with a 235. Read all there is to read regarding the swap and have hit a wall with the flywheel. Picked up what I thought was a small block flywheel this afternoon and turns out, according to the casting # 3789733, a big block version. Research indicates that there was no difference in the small to big block flywheels except for some big block 400`s. Matching it up with a 235 flywheel I got with a spare engine, it is off on the bolt spacing. Now I am confused as to which flywheel I need. The articles I have read indicate using a small block flywheel. Anyone have an answer?