Glad I could be of help. I was fortunate to have met a super nice man many years ago, who allowed me to become the caretaker of the manuals. These manuals have allowed me to share/provide a lot of information about these tractors. I continue to upload manuals as I have the time. At this point most of the manuals have been uploaded.
I am not aware of any available parts for that particular clutch. It was only used on the early models. I have maybe one of those clutches in my possession. 99% sure you could use the later model clutch, which was an improvement, but still had some issues from what I have been told by a dealer friend of mine. Daniel may can share more information on these clutches.
As far as lifting the thrower. Bush Hog did offer a spring assist kit for these tractors to help with the lifting of the rear implements. I would think it would help in lifting the front snow plow as well. I do have one or two of the kits (maybe shop worn or used) on my shelves some where. I may be willing to sell a kit if you decide it would be of help to you. Also does your tractor have the factory spring assist on the left hand side of the rear hitch?? The early models most likely did not have this assist spring on them. I believe it came later on in the improvement of the models.
The pdf below is for the spring assist option that could be purchased to aid the existing spring assist lift mounted on the left hand side of the tractor.
Bush Hog Implement Lift Spring Assist.pdf 57.09KB
Edited by sacsr, December 22, 2014 - 10:48 AM.