Ever wonder what those Ford Part Numbers actually mean? Let's take a look at an example.
Example Ford Part Number: C8ZE-9425-AK
Here is a quick breakdown of what that part number means:
C8 = made originally for the 1968
Z = Originally designed for the Mustang
E = It was designed by the Engine Engineering department of Ford
9425 = Part class number, most if not all Air Intake Manifolds will use this part class
AK = This indicates the version or revision of the part, for example they would use different letters to differentiate between a part made specifically to fit the 302 and a part made specifically for the 351 Cleveland, or if they made a revision to the part they will indicate that by giving it a new letter.
Here are a couple pages that give more info about deciphering part numbers: https://m.roadkillcustoms.com/decode-ford-part-numbers/
You can use the Master Parts Catalog to find out what this exact part number represents. lincolnoldparts.com offers the pdf of the Mercury Lincoln Master Parts Catalog from 65-72 as a free download: https://www.lincolnoldparts.com/pdf/parts-books/1965-1972-Lincoln-Mercury-Accessories.pdf