I despise those fosdick electric fans screwed to the radiator core. I have yet to see one of them that will cool the motor properly. Electric fans work well on OEM applications, but that's because they have in-house mechanical engineers on staff to use all the right stuff.

The best we can do as hot rodders is to use the tried and true 7-blade, 18" diameter mechanical fans bolted to a thermostatically-controlled fan clutch with the blades sitting halfway in and halfway out of a closely-contoured shroud and sucking through the largest radiator core that you can bolt to the frame and frame brackets. My approach to this has always been to seek out a 70's/early 80's big block Impala, Caprice or truck in a boneyard and take all the components including radiator. Cap this off with a quality 190/195 degree thermostat and you're home-free.

Do not use serpentine pieces unless you use the entire serpentine system. The fan blade is stamped reverse to what you need with a fan belt system.

Here's some good reading.....
https://www.crankshaftcoalition.com/...cooling_system

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