Are you building a bike to fit an era? Pre 85 or evo? If it's a pre 85 then get the later motor.
Exactly, work out what class your running and buy a motor for that class, you seem to want to do a whole lot of cutting and pasting of motor components that will do nothing except make your wallet a whole lot lighter...
yep you are right, dumd arse here is on a learning curve = to a brick wall so teasing out options seeing were to go or not to go with the guidence of you Maico Guru's I may have half a chance