74 Dart Stalls when in gear.

Here are some Pics of my Carb setup. Still Can't keep it running in Gear. Obviously Vacuum advance is not the culprit since it doesn't have one. I could crank the Idle way up but I just don't think I should have to. How does the Carby "Know" When you're in gear and to bump the Idle up??? Therein lies the answer I believe.