So, the Fhead is at the machine shop; they found two cracks in the block, both visually begin about an inch from an exhaust valve seat, goes? there,? and? reappears below the valve seat insert.? Concern is potential leaks, failure to pass a pressure test, whether or not a repair is possible or advised.? Hard to see in this picture, basically two similar cracks within the yellow area.?? They'd prefer that another block be found.? Anybody have an Fhead block around?

Dan