I"m not sure about the 'vortex' idea-

I've owned several cars that came from the factory with fan on the water pump and an auxiliary electric fan in front of the radiator to keep the engine cool when the a/c is on. If the factory can do it I don't think there would be a vortex problem.

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi