1730 1968-1972 Jeep AMC 304 360 401 4-7/16" water pump (impeller)This is an impeller for rebuilding an OEM or NOS pumo and NOT the water pump The pump casting for 1968 1972 AMC and Jeeps was DISCONTINUED due to low volume. We still manufacture the CNC machined billet impeller designed with an increased vane count and a reduced impeller clearance to achieve greater flow rates, higher block pressure. A Type II Class II military grade anodize surface coating protects against corrosive fluids. We developed this hi flow