I saw this truck on the 4th at a car show but was not able to locate the owner. Well detailed truck. I'm guessing Vintage air, but not sure. The center vent and AC control look very near the original. Vintage sells the side vents that also look like the original ball vents, but as you can see this guy chose a different style. The other advantage of using an after market setup is that the AC, heater and defroster are all under the dash. No steamer trunk sized suitcase that you have to reach over to touch the engine.

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'67 GMC 3/4 292 4spd