[Aussie Mike]

Don't know if this will help but fuel slosh from the float bowl vent tubes might be your problem. I'm not familiar with Edelbrock carbs but on Holley carbs under hard braking or acceleration fuel rushes forward/backward in the float bowls and sloshes up out of the vent tubes. These are 2 tubes with slash cut ends that stick out of the top of the carb into the aircleaner area. The fuel that sloshes up falls down into the intake and floods the engine.

It's easy fixed on a Holley, get a 6" to 8" piece of rubber hose that will fit over the vent tube. connect each end of the hose to the 2 float bowl vents making a u shape. Cut a hole in the tube at the peak of the bend that faces upward. This will still allow your float bowls to vent but if fuel sloshes up the vent it has to travel all the way up the tube. If it makes it to the top it will just run down into the other float bowl.

This is an old drag racers trick. The fuel sloshing under hard acceleration fuel would richen up and bog down the cars on the line.

Cheers