You're tapped into "ported vacuum", where the throttle disc is below the port at idle. As the throttle opens, the disc sweeps past the hole and vacuum reaches the distributor.

You'll get at least 2 very strong opinions as to which is "correct": ported or full-time. Based on prior posts, those who are sure of themselves and insistent have the least grasp of how it works.

The answer is: use whichever one works.