In 1970, Buick surprised the entire world when they released one of the most enticing and complete muscle cars at the time, the Skylark GSX Stage 1. Featuring a 455-CID 4-stroke carbureted V8, the GSX Stage 1 was capable of making 360 horsepower, though it’s worth mentioning that these numbers were provided by Buick, and many say that in reality, horsepower for the Stage 1 was actually over 400.
