Well, decided against modifying that beast of a motor I bought to try to fit in this vehicle. Going to be costly modifying the motor, and machining the complex mount for it. And pretty risky redesigning a motor myself. So, after a quick glance at the classified section on diyelectriccar.com, I came across someone selling a 9" DC series wound motor with a mount for an older BMW for a decent price. Looks like this will fit with with some relatively minor modifications on the mount. Still working out the deal, but will probably end up going that route and end up with an 11" DC paperweight. Live and learn.
Cool video I came across: https://www.youtube.com/watch?v=zcZvJIx1wQo&feature=youtu.be