help needed with 904

Thank you for your response and at this point Thank you for any response! With this supposedly have been built by a speed shop I'm assuming and at least a small shift is already in it and if not some of them upgraded Parts like you were talking about. big problem how does someone like me and you have no idea what's going on? Maybe all this stuff has already been done? And possibly a big waste of my time and money if it has...
I think at this point you have 2 choices.
  1. Throw it in and see how it responds. Usually, the first thing that happens to them is it will start to shift extremely slow from 1st to 2nd.
  2. Spend a little green, take it to somebody that KNOWS mopars, and have them build it to what you want. Man, I've seen these behind some heavy horsepower and they hold up. 70Aaarcuda has them behind all 3 of his 10 second cars. Tony does them himself. He could tell you the exact upgrades needed. This may run you 650 bucks, but it would be the best insurance and peace of mind you would have. If you wanted, then you could get the right converter to go behind your stroker, and then you'd just have a quick afternoon swap from stroker to 318 if you stayed with the automatic
Sorry friend, I have no more to offer on the internals of a tranny. Maybe someday I'll take an interest in them and do them myself. But it hasn't been for over 30 years :)
Whatever you decide, good luck.