Water Pump; Mechanical, 3/4" Pilot, Short Design, Aluminum, Natural, Small Block Chevy
**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.