This aluminum water pump saves weight and improves cooling. Helps minimize engine hot spots at any speed. Fits '70-'73 429 c.i. Compatible with V8 and '72-'92 460 c.i. Compatible with V8. As-cast finish. 0.625" pilot shaft. Aircraft industry tolerances. 5.500” block-to-hub distance. Reliable cast iron CNC machined impellers. Pressure injected aluminum alloy pump bodies. Billet steel hubs and shielded-seal roller ball bearings. Includes gaskets.