1970 Buick GS – 360 Horsepower

Buick has a habit of coming up with something crazy and unexpected every couple of decades, such as the 1970 Grand Sport. Popular for their torquey power plants, Buick dropped several 350s and 400s in the GS model, but it's the 1970 GS that got the monstrous 455 cu-in V8.

The engine produced 350 hp and 510 lb-ft of torque in the base model. An optional Stage 1 trim increased power by 10 hp, thanks to the single four-barrel Rochester Quadrajet carburetor, but torque remained unchanged at 510 lb-ft. For the record, the 455 GS produced the most torque for a stock American car until the Dodge Viper came along a couple of decades later. One of the fastest classic American muscle cars, the Buick GS, ran the quarter-mile in 13.38 seconds at 105.5 mph.