Today, we bring you a January 3, 1968 letter from the A.O. Smith Corporation to John Kerr of Shelby Automotive, Inc., regarding pricing estimates for modifying the 1968 Mercury Cougar. Shelby Letter (2 MB)

The following document is a PDF containing two blueprints for the 1968 J-Code 427 cylinder heads. J-Code 427 Heads (3 MB)

The Way They Did Things Back Then… Cougar Horn Emblem Blueprint The original design drawings for the special components that were used to turn a regular Cougar into an XR7-G are now available in the documents section of this site. The documents are downloadable PDF files and were produced from scans of the original 40-year-old blue prints. It amazes me that these documents survived for all of these years. From what I have been able to piece together, this story begins in about 1970.