1972 AC Vacuum Line routing

[BruthaMan]

Hey Guys,

Working on a 72 for a daily driver (see sig for build) and need some help with the AC vacuum line routing.

I've been scouring through posts via search for the past day, including this one, and I'm still having trouble. Could use your advice.

Vacuum lines were not hooked up to the vacuum canister. I did a t-split on the vacuum line to the distributor, as illustrated in the photo below, in red highlight, and hooked it up to the canister as shown.



In the same photo, above, in yellow highlight, I ran the vacuum line through the cab and down to the ac/heater control unit, to the port on the back of the unit, as indicated in the photo below in yellow highlight.



As illustrated, there are three vacuum ports on the control unit. I next ran a vacuum line from the port highlighted in red, over to the passenger side air vent actuator. Along that same vacuum line, going to the actuator from the red port, I tee'd it off, and ran the t-off back out through the firewall, to the outside actuator under the hood.

The green port, I'm not sure what should connect there. As described above, with the red port going to the actuator, it would never open the inside air vent (on the passenger kick panel).

There is vacuum (suction) on the incoming vacuum line. It's not ultra-strong, but I can put my finger up to the hose and it will "suction" on to my finger.

Could really use some help on identifying the three ports and what should go where. Pretty sure I have it wrong, but have read through a dozen or so posts and diagrams here and still getting no where.