Could anyone give me some more info on this snowblower? How it hooks up and what models it fits?
Suggest you start lookng for an old McKee blower. Made in Ontario Canada years ago and sold to Kubota, John Deere and other companies also as their own brand.
You know it is a McKee by the fact that, although a two stage unit, there is no gear box just two bevel gears out in the open with no lube as you see in the first picture.
The blowers will look beaten up by now but still have years of service for a tractor your size. B7100's are still using them.
Although designed for a 540 rpm pto, you can run them on the higher speed rear pto which is about 750 rpm.
Dave M7040