What type of performance issues would happen if my valve covers are too small for my roller rockers set up? The problem is I bought some Anson valve covers really nice ones that have the 396 on them. so I put them on but the baffle on those have a small hole the allows my PCV valve to suck up oil which causes alil smoke at 80 mph. I took the Valve cover baffle out and put in the grommet baffle but didnt help bcuz they just made more smoke come out the PCV and the breather and even the oil dipstick. I think the grommet are to snug. anyway I put my stock Valve covers back on, ran it and it seems to no accelerate at all. but I cant here it knocking