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wonder what the proof is that there were no T/A hoods installed on Challengers due to shortage of shaker hoods?


That myth died years ago.

The N96 hood & the N94 hood were introduced on the same page of the 'What's New from Dodge' brochure.

Link to that page;

https://www.hamtramck-historical.com/images/whatsNew/1970/page3.jpg