Chromed "Autolite" oil filler cap, original cap chromed, not reproduction. Bare cap, will need baffle material added.
Also recommend purchase of a rubber grommet and either plastic (69-70) or steel (68) PCV elbow. Your specific application will determine if plastic or steel elbow. See related items.
Ford Part #: C8AZ-6766-B
$40 refundable core charge