2. Buick GS 455
Buick GS 455 is a very special and interesting car in muscle car mythology. As all other GM muscle cars, Buick Gran Sport was limited to 400 cid. But, in 1970 when GM lifted its ban on engine displacement, Buick decided to introduce one very strong model named simply Gran Sport 455. This car featured the famous 455 V8 rated at 360 hp which could launch the big and heavy car to 60 MPH in just around 5.5 seconds. This was lightning fast in 1971 and its speed is still respectable today.