Jim, mounting it is small beer, someone like aRSe will do it for you in a day no bother at all.

The rotrex is MUCH better for a revvy high comp engine as it makes lots of power at the top end where the volumetric effiency of the engine has tailed off more.

I would go for the SP30-94 if i were you and i could afford it, but you are talking 2 grand or so.