Here's one more refrence for you:
http://chadt.us/snowmobilemanuals/ Check out the '96 to '98 Polaris manual.
If I remember right, Polaris had some problems with the oil reservoir type water pump lube system. That's why they changed to a fuel/oil lubed system supplied from the case.
I don't think you would be able to add the oil line to the PTO bearing as the oil passages are not there.
Good job mattsdad. Nice to see the experts pitching. I'm just a "wanna-be".