I've had the E setup on my '57 Bird since 1966. Carbs are not my area of expertese and I had these professionaly restored 7 years ago. Have fuel leaking out of the carb body into the engine. Floats are ste at with fuel at 1/2" below the top of the carb body. With the top off he carb the fuel level will gradualy dorp. Not a good thing. Too much raw fuel going into the engine. What specificly would be leaking to cause this? I was thinking needle and seat but this regulates the flow of fuel into the carb.