Apparently doing this right would involve a new cooling fan assembly from a newer model year truck for $200, a PCM tune for $255, replacing the AC line with one from a newer model to get a pressure reading for the PCM, and that's way out of budget. The primary reason I want e-fans is quicker warmups. My typical commute is short. If I remove the clutch fan the truck warms up fast... With the clutch fan it takes almost the whole drive to work. This is not good for my fuel economy and it's just annoying. I'm thinking I just get a junkyard dual speed or dual fan e-fan assembly, use an aftermarket controller with temp sensor, and grab a wire from the AC clutch relay to turn the fan on when the AC is on? Would that work?