Quote:
Originally Posted by AZCamaroFan
simply put it's the size of the engine block. A 409 and a 283 were completely different engines, with different size blocks. Same for the 327 and 427. The 454 was the last of the 'big blocks' at Chevrolet. The 427 in the current ZO6 Corvette is actually a 'small block'.
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What he said x2... It's the physical size of the casting of of metal (ie e block) that holds the pistons and crank and other stuff..