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Ryan Peart of JGM tells us it's always best to install the camshaft first, whether it's a V-8 or a six. This allows easy cam access and minimizes the risk of cam lobe journal damage. Cam journals are coated with engine assembly lube, which has staying power. The lobes must have molybdenum grease (also called moly coat) for proper flat tappet cam lobe hardening when the engine is fired.