Re: The "W" Block
My L block is at 3.4050" (3 3/8" + .030) after the required boring and, according to the sonic testing, still has a lot of meat left in the bore.
That said, we went with Ross pistons and they had to be "custom" made. This did add appropriately $200 to the price. No one said building a flat head is cheap, though. LOL!
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