Originally Posted by 72MachOne99GT
Though, I would be inclined to guess some of the 64-70 era pony cars were RIGHT on the edge of a modern 500-550 hp rating...
Not even close! The 70 LS6 454 Chevelle was the highest "rated" horsepower car of the muscle car era and that was 450 gross horsepower. If the Z/28 was rated in gross horse power, the number would be closer to 600 than 500.
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