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Step one is to get the crank pulley off. The familiar wheel/pulley pullers don’t work here since stock LS pulleys don’t have boltholes to thread into. A medium-sized (7-8 inches or so) three-claw puller is ideal; the crank actually has three pads to clasp onto. We used a Grade 8 washer for the central bolt to press against rather than the crank itself.