Wait till the manifold comes in because you might need to port match the heads to the manifold. If the manifold is just a stock manifold ported to fit the 58mm then it's no big deal. But any pitting in the head gasket area is bad and should be cleaned up. You probably want a shop to look at the heads to determine if they're any good. You should just call Josh at JS and let him put something together for you.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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