Barry Grant/Holley 750 Double Pumper Base Plate Question

Okay, let me help you understand what is happening. I build these carbs, have 6 in stock right now. ALL BG's have loose throttle shafts compared to a Holley. Having a loose throttle shaft DOES NOT make a fuel leak; it DOES make a vacuum leak. Don't believe me? Think about this: When the engine is running it creates a vacuum under the throttle blades. When the shafts have play (which they all do unless bushed) un-metered air will be drawn around them. You may get a whistle at certain throttle openings, or it may have trouble returning to idle without a strong return spring.

Now, the fact that you have fuel pudding and running down the shafts is the real issue and is not being addressed. Why are your booster dripping? Mostly likely the float level is too high OR a bad needle & seat. Try lowering the float levels. You have sight glasses. Is the fuel level with the engine running in the middle of the glass? It should be. Is the car very rich at idle? Can you see fuel dripping out the boosters with it idling? Slowly open the throttle as you look down the carb neck.

Good luck.