1967 Shelby GT500 Mustang: • Introduction: The GT500 debuted in 1967 as the big-block upgrade to the GT350, marking Shelby’s move into true high-performance muscle car territory. • Engine: Powered by a 428 cubic-inch (7.0L) Police Interceptor V8, rated at 355 horsepower but known to make more in reality. Equipped with dual 4-barrel Holley carburetors on an aluminum intake. • Transmission Options: Available with a 4-speed manual or a heavy-duty 3-speed automatic. • Styling: • Distinctive Shelby-s