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ALbert, I think McCord makes a double thick gasket that has a metal shim bonded between the 2 halves. If you can not find a set e-mail me. I found a really trick set of valve covers that are a little higher than stock on one side with the dimple for the power booster and the welded on spark plug tabs. These look stock at first inspection but clear roller rockers. I found them brand new on e-bay last year. Let me know if you want more information.