Holy crap; that's a lot of old bits! I guess you do this for a living, then? No wonder you know so much about these old transmissions.
I've a question about something you mentioned above regarding a Belt-Tensioner Clutch... Is there a plan or a 'right way' of doing this? Even a few pictures of one would be helpful... I'm trying to design my driveline and I want to plan out what I need.
Yeah i run a small business, parts sales and repairs. Although honestly for customers i rarely pull a trans apart...we live in such a throwaway society, even with my shop having the lowest rates in the area, most get tossed with the smallest problems.
Anyways as far as the tensioner setup, go explore some racing mower forums. They have stickys with pictures and explanations. But BEWARE: they hate hobbiests, do not mention you are trying to build anything other than class legal racing mower.
I went down that road once and ended up getting banned because what i was building wasnt up to their codes(although ive had the tractor for 10 years now...its does 30mph and wheelies, is perfectly safe and i havent broken it or myself yet...)