I recently replaced my crank pulley for an Alta 0% crank pulley. All I can tell you guys is baking the new crank pulley to 300 degrees will simplify your install by leaps and bounds. After heating the new aluminum crank pulley, use some oven mits and walk briskly to your crank stub and walla its on. Easy as it can be. And by the way, you can uninstall the old crank without the OEM tools. Just buy a harmonic balancer puller and use a old matching bolt in the stub and off it will go. My total install was about 2 hours.