I am shopping for Vortec Head valve covers. With a Edelbrock vortec manifold there is no OIL fill hole option. How the heck do you get OIL into your friggen engines? I can not find ANY tall/short valve covers with Oil fill holes, PVC valve, Breather holes!!!! (ok that is a lie, I found a couple, but they said "chevy" all over them, and I have an Oldsmobile. I want it to either be BLANK or say "GM") The only option I have found are valve cover adapters, but I dont know clearances so would like to stick with something, plain, preferably Aluminum, polished or natural, and tall or short...