so, you are saying that a 400 doesnt have an overdrive? if so, that clears up alot of questions. my dads pickup has overdrive and i always assumed they had 400's and that my 81 chevy pickup had a 350 because it had no overdrive.

will an early 700r4 work with my 91 caprice?

this clears up a lot of things. thanks for the help!