What "makes" a 66 Barracuda a Formula S ??

toolmanmike said
Out of a dealership data book for 1966. Information from The Hamtramck site. https://www.hamtramck-historical.co...DealershipDataBook/1966/66_Barracuda_0008.jpg

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That's all good stuff but there are limited identifiers on the car to prove you have one after 58 years unless you're the original owner or there's a paper trail of sorts..