Fits: GM V8 454 7.4L / 502 8.2L Big Block. Bolts to raw water pump. Inlet 9 o'clock / Outlet 6 o'clock. Diaphragm Pump & Wiring Harness for Valley Industries 3-103233, 33103233. Diaphragm Pump & Wiring Harness for Everflo: EF1000, D0319-3131, D03193131.