I think it's for an AD or TF truck, or a "AD" type sedan. (Fleet/Style probably)

The Liberty/Victory (art deco) trucks have a much larger grille, and I'd assume that it's a short, wide grille based on the orientation of the chevy logo, so that rules out anything earlier than 1941.

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1946 Chevrolet 3600 - "Old Number Seven"

Cavalry's Here. Cavalry's a frightened guy with a rock, but it's here.