Water Pump, Mechanical, 3/4'' Pilot, Short Design, Aluminum, Small Block Chevy

Product Note: THIS WATER PUMP HAS A 3/4 SHAFT WITH A BILLET STEEL HUB WITH A SET SCREW TO SECURE HUB IN PLACE. FROM BLOCK MOUNTING SURFACE TO OUTSIDE OF PULLEY FLANGE MEASUREMENT IS 5-13/16''. WATER PUMP HAS PROVISIONS FOR HEATER AND BYPASS FITTINGS BUT ARE NOT DRILLED.