After researching all the old posts on this and other boards, it looks like getting a stock Volvo electric fan off of ebay is the way to go. The Flexalite fans have caused too many problems with too many people to warrant paying twice the cost of a Volvo fan. Plus with the money I save, I can get the variable speed controller. I am installing a mean green alternator so should have plenty of juice to run an electric fan. Plus with a manual shutoff in the cab and the snorkel I will install, no worries about water crossings anymore!

96 T100 4x4 - 35's, 4" SL, 2" BL, 4.88s, ARBs, custom bumper & E9000 winch, etc.
99 F-350 4x4 superduty supercab turbodiesel longbed