well.. im pretty sure just a cam upgrade wouldnt cause this.. since it has run for about 1000miles without this happenening before.
so something else must be wrong.

 

My rocker arms have it my cover as well, I have marks on mine. Not constant though of course. Same with RyanCB his had marks as well so clearance must be extremely close. You didnt like lean over and put your weight on the vc kinda pushing it in right? its not very strong could easily be pushed in if enough weight was leaned on it.

 

ok.. well i have 3 valve covers, i thought about doing this the other day. i will trim the baffles out of one. allowing plenty of clearance to see what it does. and yes i lean on my valve cover all the time.but nothing that has ever caused the valve cover o depress in any way. looks normal. the gasket on it was completely depressed, so i replaced it. but no change. hightly doubt it will help in any way.. but i can atleast try it.