As I am not a fan of electric fans, I have to ask why do you want to go that way......what drives your water pump when the belt breaks.
A cooling system in good condition will cool your engine in all conditions. When ever there is enough room for a belt driven fan, go for it.
I went the electric route on my 41 and it did squat, but impede the free flow of air. Put in a good radiator and all overheating went away. ( along with the electric fan).
Recently went on a cruise up to a ski hill....14 cars left the bottom of the hill. 3 miles 12% and 7 that varied around 6%. At the top if the hill there were only 10 cars. All 4 that did not make it , over heated , had electric fans.