Hi, 2 years ago we bought a stude that was supposed to be a goer. We got it home and we found water in the oil. So we found another block, I was pulling it down tonight to rebuild it and it has the same problem only worse. They seem to be very thin in the walls. These two blocks are rusted through where the valve springs sit up in the cavity. Can somebody please help. I would prefer a good engine then some type of repair method. I am located in Australia so would prefer one here, but I am desperate so I am open to any help!