I just put a 427 BB in my 68 Camaro Convert. and I am looking for a set of aluminum valve covers that will fit with the existing brake booster. I have some chrome Moroso's that just make it but I'm not big on Chrome. I also have the 1.72 rocker arms so I need the tall valve covers. I have heard that it may be possible to put a Corvette booster in which is a smaller diameter. Can anyone give me a hand with this?