There's quite a few alternatives..
1: EEC-Tuner
2:Chip
3: DIY Mass Air Conversion
Chip is definantly the easiest out of the three..It basically requires nothing of you, just slap it in and go.. But sometimes when you change something you'll have to get a reburn.
An EEC-Tuner is basically a DIY chip..You make the calibration, and you can constantly tinker with it. There's alot of other things hiding in the PCM that you can change too..
DIY Mass Air is probably the hardest because it requires adding on wiring, or rewiring the engine harness, and buying a new PCM from ford...If you interested, talk to Kevin(thundrn_lightning), or email me..