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Does anyone know if the fan pulleys are interchangeable. I want to do away with the stock fan in my 78 Bronco and install a fan with a clutch. I had installed a 14" fan, but I was running 210 on the highway. I installed a Dodge fan and I was running 200 on the highway and 210 in the city. I now installed a Marquis fan, which I was told was similar to the thunderbird and at idle it seem to cool the engine okay. Bad thing is it cost me $100. I saw and F series truck with a fan clutch and was wondering if the pulleys are interchangeable.