Introducing "CAGED" The 1964.5 Ford Mustang Convertible reimagined by Ringbrothers The design objective was to subtly evolve and modernize the original Mustang’s lines and proportions while honoring the aesthetic of Ford’s original pony car. The result is modern appeal and unbridled performance mating the design of a 20th-century icon with the technology of the 21st. Born from an original 1964.5 Mustang convertible, nearly every component is a Ringbrothers-built one-off piece, with the only factory Mustang parts being the center caps for the wheels.