1779 1973-1985 Cadillac 500 425 472 single groove PS pulley water pump Non AC water pumpFlowkooler high flow pump 1779 for the Cadillac 425, 472 and 500ci blocks. It has a 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 pump because Cadillacs are big and heavy and tend to get hot as they age. It has been proven time