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The 1970 Chevrolet Chevelle SS 454 is a muscle car marvel, boasting a revamped design and the most powerful engine of its era—the LS6 big block. With a whopping 450 hp, this beast could outpace your neighbor’s lawnmower with ease. Only 137 are officially registered today, making them rarer than a unicorn at a car show. If you’re lucky enough to find one, you’d better have a spare pair of pants for when you hit those exhilarating 500 bhp speeds!
Chevy’s Mark IV engines roared into the automotive scene with a bang, featuring a variety of big-block beasts. The 396-cubic-inch version made waves in the Corvette and Chevelle with its 375 hp output, while the 427-cubic-inch monster, available in the Corvette and the unassuming Biscayne, delivered neck-snapping performance. Dubbed the Bisquick, the Biscayne transformed from a taxicab lookalike to a speedster with 425 hp. Even with aluminum heads reducing weight, these engines proved old-school horsepower ratings were more optimistic than realistic.