The production model of the AC Ace 2.6 (as it was later known) is for many people the prettiest Ace of all—and undoubtedly the rarest, with only 36 such cars built. To fit the Zephyr engine, AC had to modify the frame, relocate the steering box and completely change the nose of the car. These changes are often mistakenly attributed to Carroll Shelby. Prototype chassis number RS 5500 featured the standard Ace body work. Its production model, the RS 5501-5507 (as later known) is one of the rarest models, with only 7 such cars built.
The production model of the AC Ace 2.6 (as it was later known) is for many people the prettiest Ace of all—and undoubtedly the rarest, with only 36 such cars built To fit the Zephyr engine, AC had to modify the frame, relocate the steering box and completely change the nose of the car. These changes are often mistakenly attributed to Carroll Shelby. Prototype chassis number RS 5500 featured the standard Ace body work. Its production model, the RS 5501-5507 (as later known) is one of the rarest models, with only 7 such cars built