thinkin of dumpin the duster AC?

RedFish said

I know there are differences in the firewall, etc.. in pre 73 model.
Everything about the heater case and controls changed in 73 so they may have cured some of the differences.
Anyway to answer your question... The under dash air vent assembly is easily removed. Nothing but hardware involved. Remaining system works just as it did.

Click to expand...

There are differences on the 73-76 firewalls too. A/C equipped 73+'s have the Heater Core Lines in a different spot, and obviously the Evaporator Lines poking out too. All of the mounting stud holes in the firewall are in different locations compared to a Non-A/C model. Also the Blower Motor is offset slightly compared to the Non-A/C 73+ models, and has a bigger hole in the firewall.

I can't remember how much bigger though, it's been a while since I did a side by side comparison and all of my 73+ cars are Factory A/C cars. My '74 was and still is a factory A/C car (only now I have a Sanden compressor on my 340, since the RV2 compressor wanted the same location that my 6-71 Blower is sitting in :D ), even though a previous owner boogered it up a bit by trying to convert it to non-a/c :wack: