a easier solution instead of electrics would be a fan clutch. i wanted to go to a electric but i dont know my 100amp alternator would of like it so i just went with a fan clutch. its way different than a fully engaged fan like my last one.
its cheap too, i went to a junkyard and the whole set up for 25 dollars. any one for the same motor off of a f150 or whatever will work. i got a fan clutch from a 96 7.5 motor and the fan off of a 90 5.0 f150. worked great then i wanted another blade and a life time warranty clutch so i got a 30 dollar lifetime warranty clutch from autozone and ordered a 6blade fan from summit for 40. thats 70 dollars and its unleashing alot of power, not as much as a electric fan but its noticable.
i belive a std duty fan clutch only pulls the fan 50-65% of the total speed of the crank when not needed. and it fully engages only when needed and thats probably at idle. when you're going down the track, it'll probably disengage as much as it can.