Couple other things i would like to add is this combo only has a [email protected] solid flat tappet from Dwayne Porter. I think its been a great cam for this combo, but i have to see what a solid roller can do. I try not to over octane it, so only using 101 octane at the moment. Seems to work real well so far. A mix of Dragon 110(113) and 93 pump.