Quote Originally Posted by dsmuts View Post
If the transmission pan is square with a corner notched out its a th350 if it's square without the corner notched out it's a th400. If your motor is a 400 then you have a good 400 small block chevy.
back then, Pontiac , olds, Chevy, Cadillac they all made there own engine, theres nothing interchangeable between the 4 engines, at all.


and being that it does have th350 trans, i bet its a 350 engine or smaller.