Hi Art,
This is one of those cases where in the end it's probably just not worth the effort unless the engine is free. It's a lot of work, a decent bit of money, and the end result is sort of a kludged together engine.
I'll probably get a little flamed for this, but - I'd encourage you to just go get a parallel valve 360 (it's arguable a better engine to begin with, and the RV8's really are balanced nicely with that lighter engine up front). Go bolt one on and fly! No tinkering, no weird conglomeration of parts, and something that is easily supported moving forward. Plus, if you ever go to sell it, a standard engine is much easier to market.
That's just my 2 cents as usual.
Cheers,
Stein