87 3/4 ton vaccum advance port
 

I am working on getting my 87 chevy 3/4 ton 4x4 running. It has a 4 barrel quadrajet carb on it. Where does the line from the vaccum advance hook up to of these carbs? Does anyone have a diagram of which each port is used for? Thanks in advance.

The vacuum advance on that will connect to the small nipple on the left as you stand looking at it. All the other vacuum lines will depend on a few different things but are all labeled and referenced in a Haynes or Chiltons manual.

K i will look at it today and see what i got. thanks