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Vacuum Heater Core Stop Switch

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Doglips

Doglips

Not-quite-so-new-guy
Sep 7, 2022
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This is a vacuum controlled switch that disables the heater core when the A/C is turned on. It is on a 1978 El Camino LM1 350. (I suspect 305 will be identical.) I'm looking for a replacement for this, anybody know where I can purchase one (new or used) by chance? If there are alternative solutions that accomplish the same thing I am all ears.
Thanks in advance!
 

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