I fell into an aftermarket under dash AC/ heater for mine, although the car is not back together.
I tried to post this but the new site software sucks so bad I can't even do that Find post 7 I think. this is a Classic air unit you can buy ONLY the under dash unit if you want. It is VERY compact and does heat/ defrost and AC. Downside is there is no real provision for outside air. You'd have to do something with your right side cowl vent
AC in 67 barracuda
