AC in 67 barracuda

You can also use a vintage air or classic air system and modify a factory vent box to give it that stock look.

Couple of crude pictures showing the process. Second picture is what you would trim off the stock box in order to make room for hoses. You just stuff the hoses in the back of teh opening and they blow air through the vents just like factory. Last picture is with everything trimmed and permanently installed.

You can paint the padded surround to match your interior.

Good luck.