I've got my 84 in with the mechnanic for some general maintenance and he has indicated that the cooling system is need of some attention. The heater control value is definitely leaking, as are the gaskets around the orginal water pump. He recommended replacing the water pump even though its still functioning since it's got to come off to replace the gasket. He tells me the radiator is gummed up and should be replaced as well. I assume a stock GM water pump will do. How about the radiator? Should I go stock or consider an alternative? The car does run on the hot side, very easily getting to 200 plus on an even cool day, so no doubt the cooling system isn't functioning as well as it could. Recommendations would be appreciated.