Got around to disassembling the water pump and thermostat housing. The area around the three screws in the thermostat housing is corroded away. No longer usable. Car = 1985 QV. Am I safe in assuming that the part for the 328 is the same. And if so what is the correct part number? I am talking about the entire back end of the pump that bolts to the block. This sucks. Anyone have a good one they want to sell? part numbers: 115471? 115470?