I agree with the others that the stock fan should be more than sufficient. However, do note that the GTE already has a supplimental electric fan mounted between the radiator and a/c condenser.... not including the one or two small aux fans next to the mechanical fan. If your car is GTE and the A/C fan is still in place you could bypass it's relay so that it's on full time, but you're wasting energy doing to... the greater the electric draw on the alternator the greater it's resistence and you lose more power.
Fix the real problem is what I recommend.
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