To gauge how much noise the engine is actually making, take the fan off and then make a highway speed run. If we could figure out how to put a thermostatic fan clutch on that only drives the fan when the air coming through the radiator is hot enough to need the fan (idle/traffic) I believe higher speeds on these old rigs would be much more comfortable.
Jerry
Ive been meaning to ask that same question but never got around to it. Is there a known thermostatic fan that would fit a 63 gmc 305e?
