Not saying it cant be done, but for Amtrak a couple of miles of third rail into and out of Penn, WHY??? Two control stands means twice the inspections as both would be counted as locomotives.Then you going to drag a power unit all the way to NFL for??? What if it has to go to TOR or MTR ??? Albany already has a hard time getting stuff fixed in a timely manner. If it were me and this well above my pay grade just put a pan on it and call it a day. Many years ago GE reps used to ride quite a bit when the dual modes were still relatively new and chatting with one he told me if GE had to do it again no third rail just a pan. AC voltage directly from the wire to the traction motors no giant AC to DC inverters.