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    All Small Six Car Lean with Open Air Cleaner

    Car is a 1965 Mustang with a 200 six, auto trans, stock load-o-matic dizzy and autolite 1100. When I use the stock air cleaner, the car runs perfectly. Idle is smooth and air fuel ratio is perfect as measured by a wide band O2 sensor. When I switch to an open element air cleaner, the car runs...