In 1971, the Buick GS 350 decided to go green—or as green as a muscle car can get—by sipping on regular unleaded gasoline and adding a catalytic converter to cut down on those pesky emissions. While it’s now down by 55 ponies compared to last year, it’s still got enough zip to get you noticed. With 89,1070 units produced, and 902 as convertibles, the GS 350 is more common than your neighbor’s cat but just as cherished. A tip of the hat to Gateway Classic Cars for the drool-worthy images!