Is my Vacuum too low?

Wet fuel level is the bowl level when the engine is running at idle; i.e., it is where the float and needled valve actually regulate the level, as opposed to setting the float by other means to some level when dry. When you look through the sight glass or port in the side of a bowl and set the level a certain way with the engine running, you are setting wet fuel level. Some other carbs have different ways to set wet fuel level, and I don't believe all carbs have provisions to do this.