Billet Aluminum Water Pump Pulley for AMC/ Jeep / AMX engines. Hard to find Billet Aluminum Underdrive Pulleys for AMC / AMX / Jeep 304, 360 & 401 engines 1972 and later (4 bolt crank). Made in the USA on CNC lathes at ultra high speeds for an amazing surface finish and a nearly perfectly balanced pulley. Application 1) AMC and Jeep Engines 1976 and later (4 bolt crank) Water Pump Pulley P/N AMCL3WP Grooves: 3 Pulley Diameter: 6.2" Pilot Diameter: 0.625" Overall Length: 2.7"