Z-man got it. The 1964 Dodge Charger "Roadster Concept". And yes, that things got a Hemi in it. I have seen a few of these on the web, which I found odd since it was never put into production.
//www.jalopnik.com/cars/concept-cars/1964-dodge-charger-concept-119299.php
Here's a car that I would absolutely love to own. But with only 114 ever built, owning one is improbable. I would gladly settle for an afternoon of spirited driving, tho! A tight independent suspension accounted for it's ability to beat down the exotic sports cars of the day when racing on twisting road courses.