I'm going to be swapping my motor and transmission to a 350 and ether a m20 muncie or a Saginaw speed and was wondering if I would run into problems with the driveline fit or if it would fit fine or well enough to use it for a while.

I have a 1989 firebird base model with the 2.8l v6

 

There is no Muncie with torque arm provisions, so that will cause trouble.

The Saggy is a total POS in every imaginable way. Avoid it if at all possible. And of course to fit one of these cars, you'd need the 82-only version of that, with the torque arm provisions.

Both of those transmissions would require the 82-only drive shaft; or, that you have one custom made.

 

Did something happen to the Engine Swap sub-forum? Coulda sworn we've discussed every angle of compatibility to the ultimate conclusion.

When someone says they're going to use any trans that wasn't offered in a 3rd or 4th gen car, I have to assume they haven't looked very hard before asking questions.

https://www.thirdgen.org/forums/engi...swap-read.html

15 years later, the sticky topic still has the basic answers.