Manged to pick up 2 dummy units today real cheap and was wondering what would be the easiest way to power one or both, it not my plan b is to make a set of cab cars. Also picked up a Life Like F40PH (all 3 were $30) thats gonna get made into a NPCU unit.
There is an older thread on this, but basically, there is no easy way to do that.
You could try NWSL Stanton drives, but these are expensive and might not go quite fast enough. An original powered drive is VERY loud and obnoxious. Some have done extreme modifications to diesel frames, but I'm unclear on how they've pulled it off.
I've had a fairly large fleet of metroliners for a while and this has been an elusive problem.