Chrysler made a few 3/8 scale models of the Charger 500, then played around with the wing design in the wind tunnel. This is the only surviving example.
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1959-1980 Pontiac Window Sticker Reproductions : http://www.pontiacwindowstickers.com
My Bio: I am currently writing articles for POCI's Smoke Signals magazine and enjoy promoting and discussing the history of the Pontiac Motor Division.