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1. Because the LS2 crank pulleys are just pressed onto the end of the crankshaft, they will need to be pinned to prevent them from slipping on the crank once the blower is installed. Magna Charger provides this setup (inset) to help you properly drill the hole for the pin. The black piece you see is the drilling guide that will bolt onto the end of the crank. Here, you can see it installed, as Simon drilled the holes. Don't worry about drilling too deep, the provided drill bit has a step in it that will stop you at the proper depth.