This is an open style air cleaner assembly devoid of any snorkel. We send the tops out for a quality rechrome and we can inform you of what dates we have at any one time (date is stamped on bottom, 2 digits year and month, very faint). Most are happy to use the Mustang K code 289 HiPo reproduction air cleaner assembly we sell, which Mercury used on W code GT-E's with 427's. There's also a reproduction unit available.
Ford part # C5ZZ-9600-C, C5ZF-9600-D.