Published by Ford as a technical supplement to their Muscle Parts catalog. Was the bible for many years when it came stroking/interchange. Gotta remember this was prior to the huge aftermarket availability we have now.
Also provides tons of blueprinting specs that are hard to come by, as well as very good descriptions of the Ford engine series.
I have recently (about a month ago) seen one for sale on the auction site. I came upon this looking for the main catalog.