I was thinking the same thing. A guy at a lhs store suggested the same engine you just said, then he asked me if I was a beginner, then he said go with the os or the wasp. I'm thinking os. From what I have read about the wasp .12, it was been touchy to tune. I think the os it is.
--NooP
another question, If I were to go with the o.s. 12tr, what pipe would you guys recommend?
--NooP