[Big hammer]

Thank you for the video !
For me your idle speed is high, your timing is advanced by either the hand level or base timing .
With a fast idle the carburetor is starting to pull fuel through the GAV, at a slow idle your GAV should not have any effect
At one puff I saw a whisk of black smoke, black smoke = unburnt fuel
I would move the hand lever up, slow the idle down and adjust the idle air. If you insist or need a faster idle , pull the timing lever down and pull the hand throttle down. I believe Ford talk of a rolling slow idle