I have a 454 LS6 (cast in 1981) that I have just built and it will be going into a street car. The problem is that I cannot find valve covers that will fit it with the Comp Cams steel roller rockers and Comp Cams stud girdle, and, here is the kicker, with vents. I am simply looking for a plane jane chrome cover, and since it is a street car, I assume I need vents, yet all of the covers I have tried so far hit the stud girdle. I have been to eBay, Summit, no one offers a valve cover for my application. I would think that this is a common issue, can anyone help? Thanks