4: 1967 Pontiac Firebird 400 (Hideous)
The Firebird has gone through multiple renditions of the design over the three generations of the car. It was never as mainstream as the Camaro but it did manage to find success. Take the Firebird 400 out for a ride on the other hand and you’ll see something different. The Pontiac brand was at the pinnacle of design at this time, but the 400 just seemed to fall flat.
Perhaps the designers were stumped or focusing on performance alone. Few cars have managed to captivate enthusiasts as the Firebird did. There was just something about the car that resonated with consumers. It wasn’t as popular as the Camaro or the Mustang managed to become in such a short period.