Soundguy.......I think I have most of this figured out and know what somebody did. I have been pouring over parts diagrams and PN's from the various model years.There were two basic configurations for the 1500 from start year 79 to early 82, then some changes were made in early 82. The change was adding a bushing in the output side of the load deck. With this change, they also changed the sector shaft and the cover. So...if one had updated to the new load deck (case) he/she should have also changed the shaft and the cover. The previous owner/owners did not do that.
I have the updated cover with the busing on the output side, but whoever replaced the deck (cover) did not replace the shaft and the end cover. So, I am sure that the old shaft will work with the new cover on the output side. (Only change in PN was the addition of the bushing). BUT...the reason my shaft broke was the misfit on the cover side. Across the model years, some covers had bushings and some didn't. Since the interior of my cover is trashed (worn) anyway, I think all I will have to do is have a busing installed to match the older shaft, which will already work on the output side of the newer cover.
If that does not look like it will work out, all I should have to do is get the updated shaft and cover, but I am going to try and avoid that $300 (cost for shaft and cover), buy just fixing the older cover I have now with a bushing.
Who's on first?
Man-o-an...wading through and figuring out all this stuff is worse than fooling with my old Harleys. I have the Harley pattern of confusion figured out, but these tractor people really do a better job of trying to trick a guy.
My whole problem is that whoever changed the load deck...did not update it with the sector shaft and the proper end cover.