The 789 gets its name from the melding of design cues from the 1957, 1958, and 1959 Chevrolet models. The headlights and nose are most similar to the 57 Chevy, while the mid-section and interior are much like the 58, and the rear and tailfins are styled after the 59.

The vehicle is built on a 2005-2007 Corvette C6 chassis, and shares the stock C6's 400 hp engine as well.