based upon the frequent complaints you have had with this problem child i would if money allows really do some repair or replace things which could really ruin your day sometime soon.

1. all new cooling hoses INCLUDING the ones to the heater core
2. a new heater control valve in back of the engine
3. a new water pump
4. a new radiator.....i think this is wise or have one in your trunk
5. get under this cupcake with splash pan off and really have a look see at the rack and the fluid hose fittings connecting into it.
6. give the power steering hoses a real going over
7. have a look in
8. check inside your steering boots for leaks
9. get a good look at your fuel filter and pump for deteriorating fittings and lines

all of these things on an abused car are potential nightmares