72 Dart Swinger 3.6L Pentastar +T5

Also....pretty sure that combo comes in Ram 1500 trucks in a RWD version.

And a whole slew of Chargers/Challengers/300's. Looks like an '11 300 or '12 Charger or Ram would be a good starting point, or maybe even a '15+ Challenger and try and use all the electronics and interior too.