Nice work; I bash things, but i have never attempted anything quite this "deep".
Mechanically, the 700E and descendants were/are mechanically magnificent. A Pullmor can be OK...but...
If only someone would produce an actual kit for this - or a similar - flywheel/DC can conversion for these locos (and the AC Mohawks). The motor need not be as large as the one you used, or a Pittman, though that brand would be esthetically preferable.
A basic kit that does not require the machining (would fit under the existing shell) that you did: motor, flywheel, u-joints only requiring the shortening of the original worm gear shaft, some "adapter" mounting brackets or the like. I feel that many of us would like to enjoy these tank-like beauties in a modern way, with new ERR DC cruise and command and the like. It seems that there could be an actual market.
I have the abilities to install a decent motor kit, but I am not sure I want to dig as deep as you have (though I am abusing an "ATSF" Warhorse Hudson right now - we need a Dreyfuss/Mercury version of the 5344, and I am using an old Williams brass Dreyfuss as the brass streamlining donor...it's a journey).
Your motor installation appears impressive.
