John - The shell does go on with the new motor...although you had me sweating because I hadn't tried it until this morning.
Billy, good idea. I think I am just going with a bridge rectifier to get it moving for now, but I'm thinking about either a BlueRail board or an electronic e-unit.
This thing was totally stripped out, so I need to install some lighting, and possibly a smoke unit. I know I can get parts to rebuild the original puffer, but would like to explore some fan driven options if they would fit. Royz Trains has a blower smoke unit that runs off of track voltage that looks like it may fit. Although all of these add-ons make the $200ish LC+ 2.0 docksider that much more attractive. This may stay more bare bones, but glad I reconciled the Series 1 frame and Series 2 motor. I hope that helps others that just need to replace the motor in a worn out but complete series 1 docksider.