Video shows the first 2 step this build, didn’t go as planned😬 The Buick GSX was one of the most powerful American muscle cars of the early 1970s. Introduced in 1970 as the ultimate version of the Buick Gran Sport, the GSX was designed to show that Buick could compete with the likes of the Chevelle SS, GTO Judge, and Hemi ’Cuda. It came standard with the mighty 455 cubic-inch V8, producing a factory-rated 360 horsepower and an incredible 510 lb-ft of torque — the highest torque rating of any Am