That's a pretty big cam. I would definitely check valve guide clearances just to make sure. Hughes recommends anything over .510 lift needs to have the valve guides shortened to keep the valve spring retainer from hitting the top of the valve guide, and also valve to piston clearance as well. You should have atleast 9.5 to 11 or more compression ratio before running that cam. I could be wrong but that is what I would do if it was me.