Help needed

[plymouth67]

A friend of mine recently bought a 72 Duster, it's an A/C car but, is missing the heater/A/C box under the dash. Will a box from a 74 A body work in his 72? I realize we will have to change the controls as they are different but, will the box itself bolt right up? Any info would be appreciated...
Thanks

 

[j_anderson]

I'm pretty sure the firewall is different between a 72 car and a 74 car. The blower motor hole is a different size and the heater core water line holes are in a different orientation on the firewall.

 

[plymouth67]

I'm pretty sure the firewall is different between a 72 car and a 74 car. The blower motor hole is a different size and the heater core water line holes are in a different orientation on the firewall.

Even if they are both A/C csr?

 

[j_anderson]

Yes. My dad just went through this but with a Dart. He had 74 donor car but is restoring a 72. He had to cut the firewall section out of the 74 and weld it into the 72. Both are AC cars.

Here is the firewall of my 72 w/AC. Arrows pointing out the differences

Here is a 74 w/AC (courtesy google) . Notice heater core hole orientation. Blower motor opening size is hard to see the difference here but pretty sure later years were smaller opening

 

[j_anderson]

I was chatting about this with my dad today. This is the piece of a 74 AC firewall that was grafted into the 72 to use the 74 AC box

 

[plymouth67]

Thanks for the info. Maybe he should just keep looking for a 72 box.

 

[67Dart273]

If you are not bent on "restoration correct" I would SERIOUSLY consider one of the aftermarket options. Smaller compressor, "all new" stuff, generally smaller, simpler installation. Sometimes you can find this stuff used or "new not installed"

 

[Brooks James]

Check out car electric ac, electric compressor , kit for about $600

 

[CRUZE 418]

Don't believe that they make an aftermarket A/C for an A/C factory car.
The heater core and A/C lines are swapping locations by the looks of the pictures. Picture if my '72 Dart.