Originally Posted by cobalt327
A too high fuel level can cause it. Check the float level seting and be sure the float hasn't taken on fuel and is heavier, causing the fuel level to be too high.
I suppose a too low level could cause it, but the level would need to be very low, being as how the jets are on the floor of the float bowl.
Edelbrocks have both a float level and a drop setting and adjustment is described in the manual. Both have to be 'on' target.
You also need to check the accelerator pump as some of the earlier versions didn't have an alcohol resistant cup and will.
start to deteriorate. Also, these carbs are sensitive to fuel pressure with 5 to 5.5 psig max. And any dirt - that will really screw things up.
Your vacuum advance need to be hooked up to the correct port for your particular ignition system. The RHS as seen from sitting in the driver's seat is ported and the LHS is manifold vacuum. Your PB in the back is fine along with the PCV in the front