Went for a walk last night and ran across my neighbor pushing his '65 Mustang back home. Ran over and helped him push it the 4 or so blocks back home. He said he was getting on it, going through the gears and the engine blew out a bunch of white smoke and it just stopped running. He tried to restart it, but it wouldn't crank at all. There was coolant everywhere. At first we thought it was a blown head gasket and maybe it hydrolocked the motor. He ended up pulling the intake off today and found the block was almost completely split in half. I've always heard it was possible, but never have seen it in person. The engine was a pretty stout 347 in a roller block. Was built 20ish years ago with an Eagle rotating assembly, solid flat tappet cam, Windsor Sr heads, Vic Jr intake and he just installed a Holley Sniper EFI kit. It was dyno'd at 498hp at the crank when it was built. Had about 30k miles on it when it let go.