In this video, we rank 10 of the rarest production muscle cars ever built - machines so limited that some had fewer than 20 units produced. The 1969 Ford Mustang Boss 429 and the legendary 1970 Plymouth Hemi 'Cuda Convertible are not only classic muscle cars but collector holy grails. While some were built solely for the purpose of dominating NASCAR or the drag strip, others became scarce due to low demand, high prices, or canceled production programs.
