That is really expensive for electric fans. Go to a junkyard and find Taurus or F-body fans. Advance/Autozone type places sell a fan wiring kit that is fixed at 185 degrees and is like 30 bucks that works great, it even has the air conditioner turn on wire with it. I have a single fan right now but will change to dual fans this summer when I get around to it. But for most light duty use a single fan is fine. Even if you buy new electric fans they are only about 50-90 bucks each for good ones.
0.5-3mpg depending on how you drive and other stuff is about typical for doing away with a belt driven fan. Plus the engine running smoother and quieter with a slightly faster warmup are also benefits.
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