Paul
Interesting observation and picture, but could one possibly also interpret that to mean nameplate for the scoop on the hood of a steel hood. I assume those are the nameplates that came with that packaging.
The photo Jules submitted is a true 440-6 shaker 3 prong nameplate and the box with it has 3462273, a part number number that is found in an earlier printing of the 71 parts books indicating shaker scoop nameplate.
Parts books printings were updated along the way through the model year to correct or update.
I notice yours is a Dec 1971 printing, the final printing and there are two asteriks beside the part number 2998798 which the key states "indicates change or addition".
Another oddity in the same column is "340 four barrel" obviously a Challenger emblem in the Cuda section.