Ronald:
Okay, for rebuild purposes all you need to know is that it's an F-head 161.. For parts,
www.walcks4wd.com is your starting point. He has rod and crank bearings. He also has the correct valve guides. He may have rings. In my case I needed .040 rings and could not find them. Got lucky on eBay. If you search at egge.com they show parts but I have not contacted them. They might have things you need. Delta cam in Washington ground my cam and resurfaced the lifters. They were the only ones who knew what the engine was that I found. Their service was great. There was a guy on eBay who did a very nice job rebuilding the Carter YH carbs. He may still be there. Or a man known on the web as carbking. He may be a member here. He has the correct parts for them if you want to do the carbs yourself or he'll rebuild them.
If you take it to a machine shop, make sure you or they know what is available parts wise before they start working on it. Patience will be your friend when doing this engine.
