You can do pretty much the same thing, A WHOLE LOT EASIER, with a shift kit from Sick Bike Parts. He put a lot of time and money into something that S.B.P. has been selling for years. If he's the "builder" he claims to be, a conversion to incorporate his engine with the S.B.P. kit should be no problem. (Am I wrong?)
Big Red
real technical discussion there
This isn't the only MB forum out there, go read what is being said on the other forums.