If you're car is running hot only when it's sitting in traffic, then I would say either your water pump isn't rotating fast enough (ie. underdriven) or you're not getting enough airflow across the radiator (bad fan clutch or undersized fan).
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1989 lx notch
89,000 miles
5-speed, bolt-ons, 3.73, TFS TWs, TFS Track Heat, TFS Stage 1 cam
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