Air conditioning interchange

When you get right down to it, I would think that if the heater/AC box fit, the rest would be pretty easy. Mounting the AC compressor, condenser and hoses will be no problem. that pretty much leaves wiring and maybe A cable or two. If, for instance, you needed a cable to open/close a heater hose that was not supported by the dash controls, you could always hide a choke cable knob under the dash by the steering wheel. And if worse came to worse, you could run a wire to the compressor with a simple off on switch. Granted, those are worst case, but AC as actually pretty simple. Get a 69 wiring diagram and a 71 wiring diagram. That should answer most of your questions.