Trapper mini bike

#1
I have a trapper mini bike with a 820 west bend engine. What I am trying to find out is 1 belt size for the tav and also does the engine mount directly to the frame utilizing the stuffer cover bolts or is there a specific mount that would mount to the engine then to the frame any insight would be great
 
#2
Funny enough, it sounds like we had similar ideas, although I’m interested in mounting a fully rebuilt 820 (originally from an arctic cat screamer, I believe) on my chrome 1970 rupp roadster. I would like to know if there is a specific torque converter I would need, since the crankshaft is odd to me? I’ll include a photo, but it is a 5/8” keyed shaft that steps down to 1/2” and then a thread at the end. Any help is appreciated! image.jpg
 
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