RAM 545 RFE Trans into '69 Dart

Well, I hope it doesn't turn into a mess. We bought the computer, engine and harness from Bouchillon Performance and the computer was for a engine with an auto trans.
We bought the trans from PATC and I am hoping the guy will program or detune our computer for us. The tech guy (Jim) says he gets into the computer and turns a few things off. I believe one or two them is those wheel sensors, that our hot rods won't have, I think there is more items, but that's all I know.
Two people told us that we coulld buy a Diablo Tuner and do it ourselves, but how would you know what to do or where to go?
Hoping and praying PATC will take care of it for us. Tom