Concours correct with ink stamped Ford script. Connects PCV valve to carburetor spacer plate. For all 289-2V, 289-4, 302-2V, and 302-4V engines. Ford part number C6AZ-6A664-N. These were held on with wire clamps, available here.
*Note – These molded and contoured hoses were designed to work with original style PCV valve (modern 90° PCV valves won't work). Additionally keep in mind that most anything other than period original intake manifolds, valve covers, and carburetor spacer plates can also alter the position and distance in the relationship of the PCV valve and carburetor spacer plate.