block has been checked out by reputable machine shop. it has been shot blasted, vatted and magnafluxed. it is standard bore, but will need to be bored,it has a sleeve in #6 cylinder. in case somebody may not know the casting numbers on the back of the block were this way from the factory.they were made from the same molds as the ram air III, which ended with \"4\",they then ground off the \"4\" at the factory and stamped it with \"5\". this is a \"service replacement\" block. good block at a reasonable price. shipping will be actual cost.

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