The 1970 Buick GSX Stage 1 never shouted about its strength, yet its torque figures stunned anyone who pushed the loud pedal. In an era obsessed with peak horsepower and wild graphics, Buick quietly ...

inefficient today to consider that GM was producing unique 455 Pontiacs, 455 Oldsmobiles, 455 Buicks, and 454 Chevrolets--four engines within 1 cubic inch of displacement--all at the same time.

As the sixties drew to a close, nearly everyone in Detroit had something outdo the others, and this perpetual arms race led to a muscle car effervescence of epic proportions. General Motors’ divisions ...