Welcome, and you should find a wealth of info on this site. You can read through my build (Tincup's 63 w/5.7) or 67 Dart Resto with a 5.7 just for starters. The tranny of choice is a 545RFE out of a late model Ram 1500 2WD. This will allow you to use a Diablo tuner to control both the trans and the engine. As for a mount you will have to fab up your own, but it is not that difficult.