Product Description Finish: Natural, Satin Material: Aluminum Block to hub measurement: 6 15/16". Large 3/4" bearing with 5/8" shaft. Standard rotation. The pump will clear cam belt drives and most blower drives. The billet body and impeller design offer tight clearances, ensuring optimal flow characteristics. Compatible with: 1969-87 Small Block or 90-degree V6 passenger cars, 1973-89 light duty trucks. Chevrolet Small Block 283, 305, 327, 350, 383, and 400 engines. Package Description Package contents: Includes all items shown in the pictures. Note: Professional Installation is Highly Recommended (No Instruction Included). We have multiple warehouses from which your package will be shipped.