I live down in Victoria, Tx. Gets just as hot here. I'm using a fan out of an early model taurus. It works really well, have had it for about 2 years now. I read somewhere that it flows about 3,000 cfm. It does draw a lot of amps though. It took me awhile to get the wire size right (keep melting the wires lol.) but once I got the wiring fixed it works great. Like I said, it does draw some amps. It will dim my headlights at night, at idle only. I'm gonna be replacing my radiator this weekend and will do a write up on the radiator and fan, for the how to section.
2003 Ranger FX4 level II. 3" BL, 33x12.50 Goodyear Dura Tracs, Custom front and rear bumpers with winch hookups, custom flatbed, with hi-lift, and full size spare mount, 12,000 lb winch mounted under bed, Electric fan, and of course a glasspack.