3.9 Stroker

There is not much wiring and a lot less fuel system BS is a magnum setup. Plus you can still get those parts. On top of that you wouldn't have to be worry to much on what PCM to use. No BCM to work around so the guages will still work. Hell you could use a ODB 1 system with one O2 and flash off the unwanted software in the PCM depending on what year you do with.