Center carb flooding after engine shut off
This is usually related to fuel pressure. Fuel will not flow backwards through your pump. Under hood heat will expand fuel in line and increase pressure.
Try putting a gauge on the line and watch pressure raise after engine is shut off ; it will.
These carbs can only handle 4-5 pounds of fuel pressure. Most new mechanical pumps push 6-8 #.
A good fuel regulator should solve this issue. Holley makes a good 1-4# regulator for less than $50.
Your throttleshaft may be worn, but replacing it will not solve your problem. Fuel should not be dripping onto the throttle blades after shut off.
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