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  1. pa383mopar

    Removing center AC duct on 67 GTX

    I can’t speak specifically to the GTX, but I have had the instrument panel out of my 67 Coronet with A/C numerous times. I found it best to remove the A/C duct from the driver’s A/C vent first. There are two screws holding the A/C vent to the lower dash. Remove the screw closest to the...
  3. pa383mopar

    Where do the Heat / AC controls get vacuum

    I think your main issue is that you do not have the vacuum harness attached to your heater box (as stated in post #6). That harness has vacuum lines that attach to each diaphragm on the box and runs to the A/C switch on the dash and provides the vacuum line that would run to the intake...
  4. pa383mopar

    Where do the Heat / AC controls get vacuum

    The main vacuum for the system runs via vacuum line from a fitting on the left rear of the intake manifold directly to a port on the A/C switch in the dash. The FSM has lots of diagrams to illustrate the vacuum line routing. Here’s an example from my ‘67 manual, but there are differences in...
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