Chevrolet/GMC A.I.R. Pump for small block Chevy. This is an original used unit that came out of a running 1976 Chevrolet C10 with a SBC 350. Includes the pump, pulley, diverter valve, mounting bracket, original OEM hoses, OEM check valves, and OEM hose clamps. This assembly is completely original from its vehicle. The pump has been bench tested, when it spins, it puts out air. There are NO MISSING FINS in the pump. The assembly does have some oxidation on the pulley and pump that can be seen in the pictures, but everything is very solid and can be cleaned up with a wire brush. This assembly should fit most small block chevy (GM) engines, from the part number on the pump it should be compatible on Camaro, Corvette, Chevelle, Malibu, El Camino, but please research prior to purchase as your accessory drive set up may not be compatible. Pump has stamping of part number “7801149” and “D48” and small stamping of “x01231S”, pulley has stamping “6270081 DB” all can be seen in the pictures.