Needless to say, but I've got a problem. I bought a set of generic roller rockers from Jegs, first set I've ever owned and they weren't that cheap. Anyway they're stainless steel 1.6 with needle bearing trunions and look really nice, but I can't seem to get them quited down. The engine is a new crate SBC 350 stock heads with a hydraulic flat tappet Comp Thumpr cam duration at 287/305 and intake lift at 487. I've set the valve lash at 1/2 turn past zero and they're still real noisy. Some say anywhere from 1/8 to 1 full turn for roller rockers? And some say they're just noisy? Thanks Guys!