What Banshee said. It's usually a good idea to pull your numb match motor out and mothball it and use another if investment is a concern. Yours being bored that far already you might not have too much choice anyway. It sounds like you might be in for new parts for the build anyway. I don't really think the engine overheating had anything to do with it. The kind of heat it would take to fatigue cast or steel is way beyond the kind of heat generated when you boil over. Now, the kind of heat generated when parts fail IS enough sometimes to create this kind of havok.
