Wide-Open Muscle : The Rarest Muscle Car Convertibles by Randy Leffingwell…
Wide-Open Muscle : the Rarest Muscle Car Convertibles. Randy Leffingwell. These are the striking convertibles of the 1960s and 1970s that were optioned out for drag racing. These topless muscle cars are so rare because few people had the dedication (or money) to buy a vehicle this impractical.