Quote:
Originally Posted by NoNeck
Dave -
Maybe you can get an idea from this photo from my son's '70 GMC with AC. It is a 350, but I don't think there is any difference in the way the hoses route. It appears that the valve goes between the top hose on the suitcase and the hose going to the intake manifold. I hope it helps.
NoNeck
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This photo really confuses me. I see the a/c compressor, but the rest of the components don't seem right. A/C trucks have the evaporator under the hood and the heater core inside the cabin. This photo only shows a heater core under the hood. It seems this photos shows a dealer installed aftermarket a/c system???? I'm still confused.
BTW, I agree, no water valve if no a/c. Factory heater setup had water flowing through heater core 100% of the time.