I realize this is not exactly a Holley Carb, but it's based on one.

Fuel level on a Holley is set so the fuel level is at the BOTTOM of the sight hole. Above that level the carbs flood.

If it was me I think the first thing I would do is drop the fuel level (in hot climates with todays gas I have found running the level even a bit lower to compensate for fuel expansion also helps



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