So, I may still be a couple of months from getting the Charger into the shop. So, I decided to rip into the dash and figure out what was going on with my A/C-heater vacuum system. When I did finally get in there and trace things out using the FSM, I found the shop that I'd paid to work on the car had made a mess of it. Dodge made it modular and pretty much idiot proof. No need to remove individual vacuum lines. Alas, nothing is idiot proof. There should have been one hose pulling engine vacuum. They had hooked two lines to engine vacuum and left two vacuum ports open to the atmosphere. Explains why it never seemed to idle correctly after I got it back. Luckily, I had a complete heater-A/C box assembly from a parts car with its vacuum harness intact to use as a guide since there were two hoses marked with white stripes and two with red stripes.