Can’t seem to ID this trans and valve body

High stall? 3500? 3000?
This is weird duck for sure but still a good choice I have a 904 that I can use. But the lock up feature would be cool for highway driving. Anyone have a supply house that can guide me to the upgrades to make it stronger. I know the plastic accumulator needs to be changed. As well as the others, they can be a weak link. I know Oregon performance seems to have a good amount of info. Any others? Thanks guys!