Weber Marine Carb on 360 la engine?

The simple questions.....
How much idle vacuum do you have?
Possible vacuum leaks?
Is the port/circuit plugged/blocked?

Aside from that, some tuning instruction here............
https://www.mymopar.com/downloads/carterafbtuning.pdf
1-The needle on the gauge doesn't even move at idle at that port but at the choke port I believe it was around 15 inches
2-ive been hunting for a leak but I've been unsuccessful so far in finding it. Would a mild leak cause it to have 0 vacuum at the port though?
3-its possible it's blocked, is there a way to check this without tearing it all off again?