DESCRIPTION 2 Grooves Water Pump Pulley --Material: High-quality aluminum --Surface Finish: Polished --Design: Double groove pulley --Outside diameter: 6 9/16" --Bolt circle: 2 1/8" --Center hole diameter: 5/8" 3 Grooves Crankshaft Pulley --Material: High-quality aluminum --Surface Finish: Polished --Design: Triple groove pulley --Outside diameter: 6 9/16" --Bolt circle: 2 3/4" --Center hole diameter: 1 1/8" --Applications: For Chevy Small Block 265, 283, 305, 327, 350, 383, and 400 1955-1986 --Package: Including all items in the pictures. Note: Professional Installation is Highly Recommended (No Instructions Included). Your package will be shipped from multiple warehouses.
