Considering a Silver Sport Transmission

HGM Electronics in CA has a Compushift module you can program to your liking for the 42RH. Converters are cheap for it too, if you don't want anything special. I'd go the 42RH route.
All RH Dodge transmissions work the same, so it will work.

COMPUSHIFT Mini for Chrysler A518/46RH and Chrysler A618/47RH