1974 L Code 360 Duster 4 speed with Moon Roof

Jim Ward said
Does anyone know what the YUU code is in the top right of the build sheet? It appears this car was ordered as a dealer promotional car which makes sense. I can’t find anything on what the U stands for in the top right.

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U in the top right means it was made to US specifications. C= Canadian specifications and I= International/export market (like Europe).