[Keeme]

I have the same car and we did all kinds of repairs to it (my brother is a radiator man)... New heads, radiator, water pump all the things you could think of. On this model the water pump pumps through the heater core... the heater core was plugged up enough to cause all the headaches. I had my brother put a pressure line on that thing with the hoses off and MUD came out... it ran fine after that (until other gremlins killed it).

Its worth a try.