I'd feel really uncomfortable bending those wires. There is an alternative where you can have the same effect without permanently bending those wires. It involves thick tape.
I did this mod myself two days ago and tried out different thicknesses of the tape (you'll know when you've put too much), and after finding the right thickness of the tape, my throttle does feel more responsive. This mod saved me $300 which I was planning on using to purchase the SprintBooster (similar to PedalMax).
Try it out. It's a 3 minute mod. Best of all, if you don't like it, you can always just remove the tape (and no harm done to your car).
Check out the original posts that talks about the mod (pictures included). Check out posts #3, 11, and 41. Any experience with this? - Forums at Modded Mustangs