Pontiac’s planners expected to sell about 5,000 GTOs for 1964. They sold 32,450, and General Motors dropped its displacement cap on mid-size cars the following year. That is how the muscle car era actually started, and it started as an option package that skirted a corporate rule. A genuinely unrestored early example, still wearing its factory paint and drivetrain, is worth chasing precisely because so few survived intact.