I got my 66 SB started that was sitting about 12 years, then got water in the oil. i pulled off the valve cover, to start to pull the head. i noticed that the water came through what looks like a small freeze plug,that had a small rotted hole. my question is can i replace just those plugs and what are they called so i can buy some. because the head gasket looks great, no leaks.any suggestions
thanks in advance
