Years back, sonic tested block(I believe this is inaccurate many times). Ran hot at the end of o run, checked the radiator, was low, oil was a little high and milky... oh crap, cracked block. #2 about 2" long, located at 2 O'clock looking from the front.
Vid clip latter onhttp://www.youtube.com/watch?v=3EWhFlYLgHo
"Meet my little friend... 351c"