Which vacuum port

krazykuda said
Are you sure that you are not on the special "Ported vacuum" port for the vacuum advance for the distributor? It is usually higher on the carb.

Most of the ports around the base plate are usually manifold vacuum.

I tried both ports (drivers side and passenger side) the PCV is in the middle. Passenger side gives no vacuum at idle, except when I rev the motor.

Drivers side gives erratic vacuum, and also increases with revs.