Ford built two completely different 1969 Mustang Mach 1s that looked identical parked side by side, and most buyers had no idea which one they were driving home. Same badge, same stripe, same scooped hood, same displacement on the fender. The difference came down to a single character in the VIN. This Acapulco Blue fastback settles the question the moment its hood comes up, and the answer explains a lot about how Ford sold the Mach 1.
