Fitment: 1955-1968 SB Chevy 283-350 V8 Passenger Cars 1969-1970 Corvettes with 350 V8 Engines 1955-1972 Light Duty Trucks with 350 V8 Engines Water Pump Crankshaft : Material: Steel Groove Quantity - 1 100% Brand new,never been used Pulley Style: V-Belt Groove Quantity: 1 Water Pump Style: Short Bolt Hole Quantity: 3 Pulley Material: Steel Outside Diameter: 6.75" Water Pump Pulley: .