i did see a windsor block break all the center mains like that and it still ran and had oil pressure at times. when they took it apart the 2 end caps the crank and parts of the block came out.
so, if im reading it right.... you found that after you put new rings and bearings in it..... :applause: good catch.
thats actually one of those types of things that looks discusting. looking at that break kinda makes me wanna throw up. thats crazy looking. sorry to see that.