Ive never had to do any work on a vacuum advance. I have never dealt with a carbureted engine before. All I know is that the vacuum advance is on the distributor. Where does it connect to? I've read some other threads that say you hook it up on the carburetor. Where on the carburetor? I have a motorcraft 2 barrel carb on my 302 h.o. if that helps anyone answer my questions.

 

You want to source a ported (part-time) vacuum source, which is any port on the carb above the throttle body...

Ports below the throttle body, be they carb or manifold, will be (full-time) vacuum, which you don't want/need as it negates the whole reason behind the vacuum advance philosophy.

I know there's a few on here that will argue my point, but ported is the only way to go....if you think you need full manifold vacuum on a stock/mildly built motor than you don't know how to tune a motor correctly.

 

It needs to be hooked up to a ported vacuum source, that's a port that doesn't have vacuum at idle but will have vacuum once the throttle plates are open.

 

The point on that picture is hooked up to my air filter. It's a butterfly flap I think is what its called.... Maybe its hooked up in the wrong place.