Couldn't find a whole lot of very specific information on it (still haven't gotten back up to measure it first hand) but I did find
a manual it was referenced in.
...and a couple more pics I had stashed away
I'd venture to guess the GE motor is 8" diameter and 12" long (not incl. shaft)
That EV-100 Contactor assembly is also referenced in that forklift manual, and indeed it is that very forklift I ripped this stuff out of. There was an interesting welding/transport cart that I got the other Advanced DC motor plus more thick wires from. The advanced motor is about the same sized motor, bigger voltage rating than the GE motor's 24, but the GE motor looks way more "diesel" and could definitely handle more than 24 volts. That's infortunately the one with the busted end cap. That Forklift also came with nearly the same Advanced DC motor as the welding cart drive motor, except the drive shaft is an "inny", not an "outy" and it was used to power the hydraulic pump. That motor is intact and works, and also about the same size - 8" around, a little longer at maybe 13".