The car was so named because the fuel injected Chrysler Hemi engine was placed under the Barracuda's exceptionally large rear window.
The Hemi Under Glass was developed by Hurst Corporation to showcase their products in the A/FX class - precursor to funny cars.
In 1965, George Hurst hired Wild Bill Shrewsberry of Mansfield, OH, an accomplished drag racer who had raced for both Mickey Thompson and Jack Chrisman.
After helping to pioneer it into the first wheelstanding exhibition car, Shrewsberry left at the end of the season to pursue his own project.
[2] The original 1965 car was stripped for its power train and parts in 1967 for the new Barracuda chassis/body style and no longer exists.