Quote:
Originally Posted by jleinaweaver
What differentiates a big block v8 to a small block v8?
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The bore spacing (4.84" vs 4.4" for Chevy) and deck height (9.78" vs 9.025"). This allows for bigger cylinder bore and longer stroke. While small blocks can exceed 7.5L (454 cu) and big blocks could be under 6.5L (396 cu), these maxed out small blocks often have problems related to cooling or structural strength (very important for forced induction engines) while a big block of similar displacement doesn't have these problems, though it will weigh more and be a little longer and taller.