But thanks to its high 11.25:1 compression ratio and huge Holley 780 CFM carb, the LS6's real output in the Chevelle SS was closer to 500 hp, numerous specialists declare. Our pals at Vehicle and Chauffeur tested one in 1970 and discovered it struck 60 mph in simply 5.4 seconds, going through the quarter-mile in 13.8 seconds.

The LS6 carries the highest factory horsepower score of all muscle cars and trucks. The Chevrolet Corvette has actually constantly been Chevy's leading performance car. And up till the LS6, GM would not permit any other Chevy to carry a horse power ranking greater than that of the Corvette. But in some way that stance was unwinded for 1970the greatest horse power engine you could get in a 1970 Corvette was a 390-hp LS5 454.

So why no LS6? An LS6 Corvette was offered for 1971, but its strength slipped (a minimum of formally) to 425 hp. 1969 Pontiac GTO Judge Pontiac owned the muscle scene in the early 1960s. In truth, the 1964 Pontiac GTO is widely concerned as the very first of the breed.