One of my friends has a ZZ4 small block Boss Hoss. Sound fantastic and he says it doesn't handle as bad as you would think. He's a hardcore car drag racer, as in small block normally aspirated alchohol burning dragster. He says you couldn't pay him to run that Boss Hoss thru the 1/4 because of the way it acts due to the fact of how it handles under maximum acceleration.
That being said that bike looks really badass, I like the dual intercoolers< never seen that with a GMC roots style blower, very unique.
Rusty