Good afternoon to all and Happy Spring. Can anyone help with a vacuum line routing question. The line that goes to the water valve should be a one with a white line on it. As per the vacuum diagram I have found on line. I do not have that line and I have two open ports on the heater control head. Everything else seems to be correctly run as far as I can tell. Just don't know which port to hook to the water valve. Any help would be greatly appreciated. Almost ready to fire it up for the first time. So much to put back together when you weren't the person who took it apart.

Sorry, it's a 1971 Cutlass Supreme Conv. BB

 

Yes, white hose goes to the valve and to port #3 on the selector valve. Port #1 gets a vacuum source hose from the main vacuum harness. Port #2 is capped.

 

Thank you. It's the same picture I have found online but much clearer. Huge help.

 

Once again, don't be cheap. Spend the money and buy a paper PIM.