i ran stock valve covers on a big block i would double up on the gaskets to keep the roller rockers from beating there way out .i had a thermo quad carb on top of the intake did not look like much? that what they said when i beat them and then show them what i had. i strip off the paint off the car so guys look at it as junk . now that was fun. making them look like fools with there girl friends in the car. them gold chain wearing trans am /camaro guys are still looking for that GTO