2 questions!

Been a while since I’ve had one off to remember, but I do remember 1/4 inch drive and deep well sockets being involved. You mentioned the cardboard sliders. I’m thinking your talking about the ones inside the HVAC control unit that the push buttons operate that look like straight sawblades. If so, you’re absolutely on the right track. If you can find the Chrysler Power magazine archives, there’s an article that shows how to disassemble the vacuum operator and repair it. I do know in the later model units the paperboard sawtooth sliders were replaced with what looked like fiberglass, which were far more durable. Years ago when I had my first Duster, I scored one from a 1974 Valiant that had the figerglass, but still had to JB weld the control assembly together.