Freeze plugs - brings back the memory of my old '60 Chevy. Noticed a small puddle in the parking lot at NAS Corpus Christi at the end of my shift. None of the "normal" places and seemed to be coming from behind the driver's side motor mount?? Slipped my fingers in the gap, feeling the block surface with a finger tip and badda-bing, the finger slips through the crusty surface, the water goes glug-glug-glug and the system's empty. I learned about copper expandable freeze plugs that afternoon....

Sorry for the hijack, Mark....