Ford reshaped its mid-size muscle car for 1973 to meet new federal bumper rules, and the redesign paid off with a 52 percent jump in production over 1971. Buyers could choose between a humble inline-six and a deeper bench of V8 options than you’d guess, with the sportiest Gran Torino Sport reserved for V8 power only. The changes pushed the Torino ahead of its longtime rival, the Chevrolet Chevelle, in Fords ongoing battle for intermediate muscle car sales.