1971 Daytona and Superbird. Rev muscle cars built what could have been the next generation of winged race cars. These were based off the 3/8 scale models that were built for performance testing.
Plymouth XNR Concept, 1960. Designed by Virgil M. Exner and built by Carrozzeria Ghia, the XNR made its first public appearance at the New York Auto Show. It used the chassis and Slant-6 engine from the Valiant, both of which were new for the 1960 model year.