70 Dart Hoods

I have 2 Dart hoods -- one is a factory 340 hood (1/2" Holes with 3/8" slots - 3/8" corner holes -- 4 3/16" breather holes). The other hood had scoops but no breather holes. The mounting holes are 1/4" but the puzzling thing is what appears to be a "stamped oval" hole in the rear corner. Could this have been a factory "decorative only" hood scoop install? Any help would be greatly appreciated.

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