I run the '95-'00 Ford Contour fans on my Duster, they fit a 26" radiator well- I only had to remove one tab on the shroud as far as modifications to the fans go. They're a dual fan, dual speed set up capable of ~3,000 CFM on the low speed and 5,000 CFM on the high speed. I run them with a Dakota Digital controller, but like any electric fan I'm sure that if you just wanted to trigger them with a plain thermostatic or even a manual switch I'm sure you could. That might be fine for racing but for a street car I'd never just run a manual switch by itself. And personally, I think as far as reasons why people have issues going to electric fans the #1 reason is picking a fan that doesn't have enough CFM (even some of the really expensive fans don't move enough air) the #2 reason is using an inadequate switching system. Being able set and change the temperatures when your fans come on and off is a big part of getting them to work with YOUR car, and simple thermostatic switches aren't good at that. The biggest advantage to electric fans are their improvement in efficiency, and that comes mostly from being able to run them only when you need to. Being able to control when you run them more accurately makes the whole system better.
