While many associate the Sixties with the space race and flower power, the specialists at Superformance consider the decade a golden age for high-performance automobiles—a period they are rallying to reproduce, one racecar and roadster at a time. Masters at motorsport manufacturing, the team (based in Irvine, Calif.) has been delivering exquisitely detailed continuations of classics for the last 10 years, specializing in the Ford GT40, Corvette Grand Sport, Shelby Cobra Daytona Coupe, and Shelby Cobra 289 mode…