Dan,
The only sources of info that I can suggest are:
1. Pick up parts and instruction books on e bay - generally cheap
2. Aquire a copy of "Harvest Triumphant by Merril Dennison - they do come up on e bay - it's the early very authorative history of MH and there will be snippets in that
3. Aquire the series of Farmers Handy catalogues (Canadian) - maybe 30 or so of them. Not cheap but they do come up on e bay from time to time. They were annual listings of the total MH produt range in Canada
Good luck - there were MANY models!!!!!
John