1967 Shelby GT500 Convertible

According to MotorTrend, the 1967 Shelby GT500 Convertible is arguably the rarest Mustang of them all. If you've never heard of this Mustang, it's probably for a good reason—only one exists! In the mid-'60s, the GT500 convertible got held up with production issues due to lack of fiberglass.Jan 20, 2022