ive just switched to zvh and love it, so much more torquey and im only running a bar at the mo but pulls all the way to the rev limit so dont understand why some peeps say they dont rev, im running stage 3 head etc and i was only looking for 220bhp, and zvh seemed the best route for this power keeping reliabilty as i aint running silly boost.

Downside for me was the fact that i had to switch silly bits to s2 as the alternator bracket on the s1 bolts direct to the block so a s2 item was needed and the s1 manifold hit the block so had to change that to s2, done a 1000 miles so far and am well happy with how it drives, so much more punchy and less laggy than the cvh all depends on what youre after mate