I used an electric fan from a 3.8 V-6 taurus and it works fine with my engine.
FM did an tech article about doing it a few years back.
Here it is: http://www.fordmuscle.com/archives/2003/02/electricfan/

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1982 GT
351w(.060), ported & polished heads with 1.94/1.60 valves, 10.3 comp, stealth intake, 274XE cam, Holley 750 dp, Mallory dist., shorty headers, flowmasters, 4:10 gear, c-4 with 3700 stall converter, subframes, electric fan