Richard P.
I just went thru my 1450 last winter, I didn't think there was room for a bushing either.
the bushing is a round ball looking affair enclosed in a band of steel that is press fit in the rear coupler. When I took mine apart, (After replacing 2 flex discs in about as many months,) I didn't find any thing that was left of that bushing. Apparently the PO hadn't noticed or didn't know that there was supposed to be a bushing in there. I think that they are called "self-aligning bushings". The one in front is bolted to the fly wheel and then the flex disc bolts to that, once you slip the drive shaft into ths hole in the ball. On my 1450, the rear bushing was made out of bronze, or something similar, and the front one was made of steel. BTW, both front and rear bushings were completely gone on my 1450. Once those bushings were in place, along with new driveshaft, hydro fan and flex discs, no more issues of tearing up flex discs. Not to mention a whole lot less vibration. Hope this helps
Brad