Mitchell's Mako Shark II concept debuted in 1965 as an early preview of the flamboyant-fendered, Coke-bottle-waisted next-generation Corvette that would reach production for 1968. It continued the 1961 Mako's shark-like paint scheme, with a dramatically pointed nose, a fastback roof with a louvered rear window, a power-deployed rear spoiler, serious side exhausts, black-out chrome and 'Mark IV 396' lettering on its vented, power-domed hood.
As more advanced big-block V-8s became available, it was fitted with a 427 and later an aluminum-block ZL1.
The Mako Shark II was redesigned for 1969 as this Manta Ray. Still wearing a paint design similar to the original Shark's, it grew a protective composite lip around its grille and a front spoiler below it, sported more production-realistic side pipes and lost its louvered rear window in favor of a tunneled design leading to a long, tapered, energy absorbing rear end with four round taillamps.
Among its more interesting features were twin rear-deck-mounted doors that popped up during hard braking to become reflective auxiliary brake lights. The Manta Ray was one of Mitchell's favorite for his own personal transportation.