I just replaced the heater core and it looks like I need to do the head gaskets. It seems my reward for doing the heater core was to start the thing up and see water now comming out of the exhaust pipes. My question is if I asume I have 180000 mi.on my 1990 SC can I expect I will soon lose the low end too? When I replace the head gaskets I plan to go through the heads and I wonder if the low end will take the strain of a fresh top end. The car runs great. It feels tight and is quiet. Are there some tell tail signs that may signal that I am in for doing the whole thing before I get started?