Greetings all. I'm looking for a pair of tall valve covers that will work with my roller cam. The cam is .633" lift with Comp blue roller rockers on LR heads. I'm hitting the underside of my nice M/T finned aluminum covers which measure 3.5" tall internally. :-( I think I need something closer to 4" or so, perhaps a pentroof design. Used is fine, but must clean up ok and have no cracks or problems. Please email me or post here with photos and a price shipped to my door at 80526. Thanks all!