The electric fan conversion is pretty simple. I did mine years ago in an afternoon. You will need the following:
- 05-07 Electric fan/shoud.
- Fan harness. I used a factory harness, but there are aftermarket options.
- 34" radiator. Your truck likely has the 28" version.
- Tuner or access to someone who can enable the fans in the PCM.
The parts will all bolt in place of what you have now. There is a little wiring to do, but it is not bad. Someone wrote up a pretty decent how-to
here.