there are a couple of other threads that talk about same kind of setup. I think some guys are running the "DC-Controller" brand. I'm waiting to hear what some will say based on long term use. If you had a good controller you could manage the emps better, based on the variable speed concept. I think a number of people have had problems with the various controllers. On the newer style vortecs you can controll the fans on-off through the PCM. Even though I run the dual ford fan setup (because it almost fits perfectly), will also fit the OEM radiator fine... SPAL makes a good product, at least in the fans. I'm going to see what some others have to say about the long term use of the SPAL fan controller before I go back to using one of those.