The truck has a 700R4 in it right now I'm assuming (Or a 4L60; not sure when they made the change) but, the truck is going to be a street/strip truck so I don't need the 700R4. I was debating about using a trans crossmember from a 1990 SS454 truck since those were Turbo 400 trucks. Would that work would is there an easier was to swap to a TH400?

Thanks guys.

Matt