Came across a link that has a lot of scans from old magazine articles on the six cylinder. Pretty interesting stuff and I'd never seen this webpage before. Includes:

Hotrod Inline Six Archives
http://www.geocities.com/hotrod_inline6/

• Horsin Around With The Mustang Six: Part 1
• Horsin Around With The Mustang Six: Part 2
• Stroke The Falcon Six: 144 Cubic Inch
• Modifying The Falcon 6: Part 1
• Modifying The Falcon 6: Part 2
• Building a H/MP Maverick Six
• Ford Comicstrips
• Ford Off Highway Operations Parts
• Inline 6 Tuneup Checklist
• Stroppe&Associates Modified Head
• Making the Falcon fly: Part 1

Thought I'd pass it along!