The Building of the Blue Mistic

I am running a Gen3 trans as well, so I am using the factory gasket/spacer. A 545RFE with a TCI 2400-2600 stall.
I probably missed it, but what did you have to do, to get that modern Mopar transmission in that Dart? Otherwise in my case, I'll probably go torqueflight with a gear venders overdrive but don't know yet. I'm open to suggestions. Will be going with 6.1.