Engine bay aesthetics

Vacuum actuated A/C and heater controls.
Yup. I'm not sure of the routing but at least one of those goes to the canister on the fender.
The feed to the canister comes from the carb's lower manifold vacuum port. So that connection is correct.

The slightly higher port is vacuum for the distributor (and EGR for cars that came with that).
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Some pictures here of similar on a 71 with slant 6 and A/C. But unfortunately not hooked up.
71 Valiant, Heater Vacuum Lines/Controls