For Ford Barn 2.pdf
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I worked for a company Arvin Industries (was formerly Noblitt and Sparks) that was a tear 1 supplier for Ford Mufflers. We did build the Model A muffler. When we were NS we built tire pumps, hub caps, brake levers, radiator outlet tubes, heaters, mirrors and jacks for the Model A. We had what was called running changes and the prints would not get changed. These running changes would get what was called a deviation. We could produce the product although it was not to part print for so many days. So part prints are not always up to date per production parts deviations. The deviations would not go into the level change box on part prints. Today Ford, Chrysler and General Motors use the same deviation. The deviations today has all three logos on the top header of the deviation.