From Attuworld
The “789″ represents a styling hybrid of a 1957 , 1958, and 1959 Chevrolet. The front end is designed from ’57, the side styling is from a ’58, and the rear is ’59 Chevrolet styling. The body is fused with a Corvette C6 chassis to create the car represented below.
According the N2AMotors web site, a Chevrolet 789 costs $135,000 turnkey. However, if you supply the Vette the cost is closer to $40,000. This includes a wheel and tire allowance, custom exhaust, and suspension upgrades.
Go check out the link above for a bunch more pictures.