[Red Box Rebel]

1968 GTO with original factory A/C. The A/C and Heater selector controls a ported vacuum switch that routes vacuum to blend doors and other A/C and Heater components.
Vacuum comes into the disc shaped ported vacuum switch and is supposed to direct vacuum based on where the selector is set to. As the selector is moved up from Off:
1.Off
2. Vent
3. Inside
4. A/C
5. B/L
6. Heat
7. Defrost

On the ported vacuum switch are six vacuum ports. The vacuum in from the intake manifold and five ports for opening and closing the blend doors.

With the selector in the off position, the ported vacuum switch mechanism is able to hold 15 In.Hg. With all five of the other ports sealed off, when the selector is moved to any of the the other port positions from off, vacuum drops to zero. I assume that the ported vacuum switch has some internal seal that is no longer able to hold vacuum as the vacuum is directed to the five ports.

My question: Can the ported vacuum switch be repaired? Can the ported switch be replaced by a new one? Does anyone offer a repair and/or restoration service for this "Unique to 1968" Ported Vacuum Switch?
The original factory ported vacuum switch is 52 years old, so I am not surprised that is not holding vacuum any longer.
Anyone else run into this problem?

[fatindian]

I'm working on one now. Haven't checked it yet because everything is still apart, but I was wondering if I were going to run into the same situation. I don't want to put it all back together and then find out it doesn't work. Since the part is so old I'm not sure that an NOS piece would be any good. If you get any answers please post them and I'll do the same, thanks, Rick