alteredguy,
About that engine, can't you use the engine, clutchshoes and clutchbell as it is ?

If I were you I would definitely get a beltdrive for the tail, It's a real money/time saver and you can use it with brets tail gear housing.

I attached my engine in front of the mainshaft to get a better CG. The design of the crutch is a little different from the original though
I'll post pic once I get home from work.

//Peter