10. Buick GSX
The 1970 model year was a watershed year for American muscle and performance models. Never before or since were there so many great models available. Backed by steady sales and great reception of their muscle cars, Buick decided to introduce the ultimate muscle car in the form of the legendary Buick GSX. The GSX stood for Gran Sports Experimental. It was a visually upgraded Gran Sport with a Stage 1 performance package.
The GSX debuted in 1970 with an aggressive graphics package not typical of Buick products. It was available in two bright colors, Saturn Yellow and Apollo White with front and rear spoiler, functioning hood scoops, side stripes, and Rally wheels. The power output was 345 HP from the factory, but everybody knew that Buick engineers hid at least 100 HP and the true performance potential was much bigger. That’s why the GSX was one of the fastest cars of the era.