[Uisce]

Factory water pumps last 100,000 miles or more, and they bolt right in.

I have to believe they are more reliable than a home-made electric setup, and a hell of a lot cheaper. Some sheet-aluminum ducting to direct air through the radiator would be more effective for freeway cruising, and does not increase system complexity.

Occam's Razor: All else being equal, the simplest solution is the best.