Piston pin bad ?

At this point I am not to concerned about the piston. It will have to be replaced and the block and rotating assembly checked out and cleaned up. The water thing makes sense except for the fact that there should have been signs of that much water in exhaust .
Are you thinking water was sitting in cylinder during storage? Not possible since when I
Assembled the top end all holes were shiny and clean.

I am about to pull drivers rockers off.... If they are toast I am suspecting defect in materials...