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Chevrolet Chevelle SS
The Chevrolet Chevelle was always a popular muscle car with its combination of an affordable price, attractive design and powerful engines. But for 1970, Chevrolet offered an expanded line of engines including the famous 454 V8 big blocks. The regular version was the LS5 and it was powerful.
But there was an even stronger LS6 variant Chevy installed in just 3,700 cars. The LS-6 had an almost racing compression of 11.25:1. Also, it used a bigger carburetor with much stronger engine internals. And although they rated it at 450 HP, it is more likely it produced over 500.