help needed with 904

Actually a little surprised no one has any ideas as to what I have. I guess I'll slap the transmission together and hope for the best. Maybe reverse was just bad linkage.
First, I'll state it right now I'm no internal tranny expert. 2nd of all, let me say the 904 can be the weakest link (it was mainly a slant 6 or 318 2bbl tranny), but with a few upgrades can be bullet proof.
I would advise, as cheap as it is, to upgrade the 904 to kelvalar bands, up the kickdown ratio, and at least a jr. shift kit. And you can also put a little more into it and bolt your stroker up to it for a quick changeover (engine only).