Eddlebrock Carb Rebuild

At about 1:14 in your video, the piece you are fingering is the "fast idle cam" and the screw on the front throttle butterfly (throttle arm) is the fast idle adjustment. When the choke is "set" it pulls on that linkage and allows the cam to move down against the screw. When you tap the throttle or pump the gas, the cam moves in place so the screw "jacks up" the cold idle

Did you read the book? Page 8