This product is an NOS Part.
NOS items are OEM parts from Ford that have been sitting on shelves or in warehouses for years. These are often great examples of the orignal parts, but they may have scratches or other shelf wear.
However be aware that some NOS parts are "service replacement" parts. "Service replacement" parts are not exact replacements of the parts that were installed at the factory, but are what Ford considered as "good enough" and were used at Ford dealerships after the original supply of parts was exhausted.
We often leave NOS product listings on our website after they sell for reference purposes.
NOS 1983 Ford manual on how to read and understand vacuum diagrams. Although it's technically made for older cars, it has tons of useful information on how to decode diagrams. Includes sections on vacuum theory and applications, devices, hoses, schematics and system diagnosis. This handy book has information pertaining to how the engine creates vacuum, the carburetor and it's vacuum pressure regulation characteristics as well as air intake, fuel induction, emissions and ignition.
As an added bonus, there's a quiz on one of the last pages!
Issue CTP-1983-6
July 1983