DESCRIPTION Water Pump Pulley --Material: High-quality aluminum --Surface Finish: Polished --Design: Single groove pulley --Outside diameter: 6 9/16" --Bolt circle: 1 3/4" --Center hole diameter: 5/8" --For Chevy Small Block 283, 305, 327, 350, 383, and 400 1955-1968 Crank Pulley --Single groove. --Pulley diameter is 6 9/16". --Bolt pattern is 2 3/4". --Center hole is 1 1/8". --Machined from billet aluminum. Package: Including all items in the picture. Note: Professional Installation is Highly Recommended (No Instruction Included). Your package will be shipped from multiple warehouses.
