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Hardened seats are only half the battle. Counter sinking valves can ruin a cylinder head in no time if run hard heating up the cast iron. Second is the intake valves sticking. The lead years ago, late 70's into the eighties was eliminated. The lead acted like a lubricant for the seat and the...

Welcome to the Forum! Since you live in the North, and depending on if you plan to use the truck in the winter months will determine the weight of oil used. Just one thing, what ever oil you choose make sure that it has some kind of zinc content. Or if not an additive should be used for anti...