73 RR 400 vacuum connection on manifold for a/c heater controls

[b_body_hopeful]

Can some one tell me where the vacuum hose that goes from the check valve inside the pass compartment thru the firewall
into the engine compartment connects to on the engine and what size fitting is used? I am trying to reconnect the vacuum controls
for my a/c heater controls.
Thanks in advance.

 

[b_body_hopeful]

Solved the problem....Connected the vacuum line to the manifold port of the carb... Works like a champ. Sorry for the thread.