A diesel! Your brilliant. Im seriously going to look in to this.Find a 7.3 power stroke and put it in there,i've read quite a few swaps of people doing that.Great fuel mileage and all the torque you could ever need.
My dads got an 04 with the 5.4 2wd, and yea that thing will move. Ive had her on the speed limiter at 94mph and you could have a normal conversation with someone at the same time. The one thing i hate though is that damn fly by wire throttle setup they got. You lose that "driving by the seat of your pants" feeling you get with driving our broncos. The new trucks are more gradual and smooth with how they accelerate. The 5.4 has a ton more power than my 5.0 but my 5.0 feels a hellova lot faster than my pops 5.4, yet i wouldnt dare race him, maybe drag him around the backyard but not race him.We have a 2005 supercrew 5.4 4x4. Its fast, you can drive 90 mph all day and it feels like you are going 55. Great running engine, but the way ford setups up the new trucks it doesn't have the low end stump pulling power like the efi 302 and 351W have. The 5.4 is very complicated, I don't know about using it in the mud...it's mainly controlled by electronics... the gas pedal isn't even cable controlled anymore. Plan to spend time getting everything perfect.. I know it may be possible to get it to run in a bronco.. but How well can you make it work is the big question.