Considered by many to be the ultimate muscle car of the classic period, the rather unassuming Chevelle packed 450 horsepower from its 454 cubic-inch V8 in top-dog LS6 trim. Its only mission was to beat everything else in a straight line, and with either a three-speed automatic or four-speed manual with a crazy-short 4:33 final drive, it was among the quickest showroom stock offerings for 1970.