Didn't take you long to become a contributor. This site is well worth it.
Family history on the tractor makes it a keeper. Some day I will move down to around that size, I think it makes a perfect gentleman's farm size. Wasn't 76 close to when they first started making them? More than a few people here that farm.
Do you plan to use it mostly on road, light off road, moderate off road, etc?
There is a member here I believe in the Midwest that might have the frame parts you need (delnick?). Hopefully someone will chime in with better information.
If you haven't already done it some heavy duty metal shelves will be a big help along with some totes to keep things organized. Label and bag everything, I know kind of late for that. If you have something you don't recall where it came from post a picture and someone will be able to tell you exactly where it came from.
Love the shop toys.