'70 Dart 392 Project; what direction?

Cool project. Just a thought , you may want to want to upgrade to a Hurst competition plus over what looks like an Inland shifter. The Hurst has a tighter feel and has strong lever stops to keep excessive shift pressure off of sincros and shift forks. Also you can use many different shifter handles. I have run Inland and factory Hurst shifters and they tend to be a little sloppy. Also what clutch are you using , I had to mill my hydraulic throw out bearing to get proper clearance with a Lakewood scatter shield and Center force duel friction clutch.