The new carburetor has gone through many strict test procedures. We have tested the leakage, idle speed and other test items to ensure that the carburetor at the factory is suitable for fully qualified.Carburetors are not suitable for 240 ci engines. Please pay attention to the installation direction of carburetor cables. Please compare with your original carburetor before ordering, or send us an email to inquire.1963-64 Ford Truck straight-6 engine 223 cu in (3.7 L)1963-64 Ford Truck straight-6 engine 262 cu in (4.3 L)1963-1969 Mustang straight-6 engine 200 cu in (3.3 L)When installing the carburetor, only adjust the air mixing screw on the base. If the idle speed needs to be adjusted, adjust the idle screw

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