generally speaking, as long as the car dosent overheat, they will not blow. but once it over heats even once...say good bye to the Hg's. I'd replace the thermostat, the hoses, and coolant(Add in some "water wetter" or similar product, royal purple's is pretty nice) replace the waterpump and belt and make sure the radiator and fan are in good condition and working properly. Other than that...watch the water temp gauge(make sure the sender works well..mounted on the driverside of the engine on the upper intake(right above the thermostat housing) and you shouldnt have any problems.
I will flush it, but it just that I have never seen something like that before. Along with replacing motor mounts
power window motor rebuild
change diff fluid
change transmisson fluid
fix cracked distributor
replace spark plugs and wires
and convert to stainless steel braided instead of that rubber garbage brake hose (where can I get some)
will do, also another quick question, upon opening my cap to the power steering fluid I found that it was overfilled and it looks like oil that has been over used, as in thick tar black kind of oil, I take it, this is not normal, how do I do a power steering flush?