Proform , Harmonic Balancer Installation Tool, Fits Small & Big Block Chevy Cranks. Part Number:SAP66515. $51.21. Out of stock - Contact us for availability ProForm 66515 Balancer Installer Pilot Stud Washer Chrome Harmonic Balancer Harmonic Balancer Installer Tool For Chevy SBC & BBC - 66515 Replacement Installation Kit SBC BBC Installation Tool Crank Pulley Installation Tool Proform 66515 Harmonic Balancer Installation Tool, Steel - Black About this item This Proform harmonic balancer tools make installing the balancer simple; just thread the proper end into the crankshaft, and then rotate the nut pressing the bearing against the balancer. This in turn will slide the harmonic balancer onto the crankshaft smoothly... Used for installing the harmonic balancer Harmonic Balancer Puller And Installer Harmonic Balancer Tool For Chevy SBC/BBC Engines - Crank International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.