1974 big block water pump pulley, single-groove Shipping from: Pittsburgh, PA 15236 Price: $25 Payment Methods Accepted: PayPal or money order 1974 big block single-groove water pump pulley. It was included when I bought a 1974 400 HP P code Road Runner 10 years ago and I sold the car years ago. Not sure if it fit the 400 engine, no part number present. Shipping extra. PM me if interested or if you have any questions. Thanks.