67 Heating/AC Vacuum Source
I am a ways away from needing this, but I have spent way too much time looking and haven't found it. Where is the engine vacuum source for the heater/AC control?
I have my engine running and all vacuum ports accounted for (i.e. transmission, dashpot, distributor vacuum advance) and I don't have any additional vacuum sources on my stock Rochester Quadrajet carburetor or stock manifold.
Before I did disassembly, the original vacuum connection from the hollow stud at the back driver's side of the carburetor had a vacuum line that went to the dashpot, but also had a "T" fitting that was cut and plugged. Is that the vacuum location for the heater/AC control and off of a factory "T"?
Thanks in advance.