Awesome! Thanks guys for your input! I think my plan will be to get the 3 pin driver and flea bay adapter

and then mock up the engine for an exact measurement on the drive shaft extension. Then, I'll get the drive shaft, shaft spacer, and engine spacers and figure out the mounting holes, after the drive clutch and PTO are lined up.
Any advice on mounting the flea bay adapter with the plastic fan designed to mount between it and the flywheel?
Also, will I be able to use my original wiring harness and ignition switch? Or will it need to be swapped out?
Thanks again for all of your help!