Product Description Suits Small Block Chevy 283, 305, 327, 350, 383, and 400 1955-1968 Single Groove Short Water Pump Crankshaft Pulley Material: Aluminum Finish: Polished Outside diameter: 6 9/16" Bolt circle: 2 3/4" Center hole diameter: 1 1/8" Package Description Package: Including all items in the picture. Professional Installation is Highly Recommended(No Instruction Included). We have multiple warehouses from which your package will be shipped.
