This a great option if you running power steering and NO A/C. Will not work with Vortec engines. For standard (non-metric) water pumps.
Will not work with reverse rotation pumps. Bolt circle for water pump pulley is 2-1/4" with a 5/8" pilot hole.
Water pump pulley is 6-5/8 in diameter. Crank pulley is 6-5/8 in diameter.
5- Single Groove Water Pump Pulley (with bolts). Double Groove Crank Pulley (with bolts). Single Groove Aluminum Alternator Pulley With Nut Cover. Single Groove Saginaw "Key Way" Style Power Steering Pump Pulley.
P Professional Installation is Highly Recommended (No Instruction and Wiring Diagram Included).