I don't have the perfect tool to measure the damage but shaving .030" will remove most of the pitting for a proper gasket seating and I have 11.5 of total block height. My idea was to install a high compression head and the Brumfield 5.2 have extra material to be shaved to 5.9 so no problem for clearance I think. The bore is actually 3.890" but the pitting on one cylinder is deep, probably .050" The engine came with the sleeves and pistons anyway. My main concern is the metal remaining around the exhaust valve and port, approximatively .300" at the thinnest point. The lobes on the camshaft are pitted also.
