I always assumed ported vacuum was venturi vacuum, but now I have heard they are different. I do know what manifold vacuum is. I have a 1956 f100 272 with a 1957 distributor and the vacuum advance is hooked to the port at the back of the 2 barrel carb above the throttle so the vacuum advance gets no vacuum at idle but does get vacuum as I open the throttle. Do I have it hooked up correctly?

1956 F100 272 4 speed
Northern California