ORIGINAL: madtrev
Example: Chevvy smallblock originally called for a deck height (crank center line to top of cylinder) of 9 1/2'' , but most I've measured come out over and up to 9 3/4'' .
How can this be? This would reduce compression ratio by a a tremendous amount! There is no way a block ends up .250" out of tolerance these days. Are there not variants of blacks for different strokes and such?