If it advances when you hook up the vacuum advance hose, then you have vacuum applied.

If you truly do have it attached to the ported vacuum nipple, then you either have a defective carb or your idle speed screw is cranked up way too far and you are now into the transition circuit and hence you have ported vacuum at the nipple.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.