Buck Tags can give you a lot of useful information about your car. This was the info used by those on the assembly line to know where to drill holes in the body. The buck tag is located on the radiator support on the 1967 - 1973 Mercury Cougars.
The picture of the buck tag shown above is a photo of the buck tag we discuss in our video "Is it numbers matching? 1967 small-block Cougar decoded":
The Buck Tag decoder chart below is provided courtesy of Phil Parcells. Used by permission.
Please let us know about any corrections and/or additions and we can forward the information to Phil.
If you are interested in more information about the different tags on your Cougar or Mustang, we would highly recommend Cougar by the Numbers, Mustang by the Numbers and The Mustang and Cougar Tagbook, all of which are written by Kevin Marti, owner of Marti Auto Works, which holds the license to the Ford production database for the 1967 - 1973 production years.