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didn't all the cylinder splitting happen recently with the long stroke cranks and short skirt pistons loading the cylinder walls or do they also split with stock stroke cranks?

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I have seen several 400 blocks with 3.75 strokers split the cylinders with 6.76 long rods. My 1976 400 block with 6.8 long rods and a 4.300 stroker hasn't split one yet, thinness spot sonic testing in any of the cylinders was .163, thickess was .230 after boring I have seen thinner and thicker stock blocks As already said you have to test a bunch of them to find a really good one, that is the reason I bought one of the new World wedge blocks at 4.500 bore I have sonic tested it on the thrust sides,it is siamese bore, and the thinness I found was .300 That rascal is heavy though