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cj847 · 06-29-2022, 03:08 PM

The passenger vent door on an A/C truck is vacuum operated. So, there is no pull handle, and no room to leave the vacuum diaphragm. Non A/C you could leave it. I'm not sure you can open it 100% however.

On my 67 non A/C truck, I used an Old air system and have both vents fully functional.

06-29-2022, 03:08 PM	#2
cj847 Registered User Join Date: Sep 2016 Location: Ft Smith, AR Posts: 550	Re: Vintage Air Vent Door Question The passenger vent door on an A/C truck is vacuum operated. So, there is no pull handle, and no room to leave the vacuum diaphragm. Non A/C you could leave it. I'm not sure you can open it 100% however. On my 67 non A/C truck, I used an Old air system and have both vents fully functional.