Richard believe it or not, many (maybe all???) 1972s did NOT have a heater shutoff valve.  My 350 2bbl with A/C did not.   Hot water circulated thru the heater core continuously and a vacumn operated door in the heater box sealed the hot air from the inside of the vehicle. 
 
  I have looked thru my  1972 factory assembly manual & Factory service manual and neither references a control valve. 

 
On 8/23/05, Richard Cox <[EMAIL PROTECTED]> wrote:
I'm trying to figure out the correct Heater Control Valve for my 1972
Chevelle SS Small block with Air Conditioning. I thought it was the type
that bolted to the passenger side inner fender. But I ordered one from NPD
and they sent me the valve that has the fitting that screws into the block?

Which one is correct?

Richard Cox

ACES # 06765

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--
Rick Schaefer
72 TPI El Camino

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