In my hellcat swap im running the Mopar crate controller. The mopar crate controllers are very nice for all the swaps. High quality , comes with everything ( gas pedal, body control module etc) and the PCM is unlocked so it can be tuned without unlocking it. Im running a Cope 727 for a trans. My current project is a 99 Dakota RT that I will probably go with a nice cammed 6.4 and an 8 speed. They didnt have the 8 speed really proven when I did my hellcat swap. If you get a used 6.4, make sure its a motor that didnt eat a lifter.