I last ran this motor on the dyno with a Comp MM305 flat tappet cam. Next time on the dyno it will have a roller with about the same seat duration but a lot more lift. We'll see if it likes it or not. One thing I know for sure, it costs a bunch of money to step up like this. I've spent about $3000 so far and I still don't have it running yet. So the HP/$ ratio isn't so hot.