Glen,
Finally got around to removing my wiper motor, as it is just extra weight and I have no wipers. Mine was mounted on top of the driver's side footbox and it is heavy. If you look in this older photo when I still have the four barrel carb on you can see it sitting on the foot box looking beyond the air cleaner.
It was a messy removal, as the cable was saturated with grease, so if you do not have any directions, one that I can add is that you should grease the cable as you insert it into the tubes. My motor had a metal cradle that it sat in, with a bracket that held the motor in place. Looks like a PITA to install from my perspective.
Good luck with it and I look forward to seeing pictures and hearing curse words.
Jim