While all the other automakers detuned their muscle in 1972, Buick put out this beast with the same 360-horsepower 455ci V-8 that powered the 1970 GSX to glory a few years earlier. By '73 ...

There is no better car to dictate the steep decline of muscle car performance during this time than the 1970s Buick ... GSX include a black stripe across the length of the car, a rear spoiler ...