Originally Posted by 5.8GT
My car is currently speed density I have read about MAF swaps and it sounds pretty easy. Has anyone done it? Does it actually work? Or am I better off getting a wiring harness out of a 89.
Yes it works. See the Useful Mustang Info sticky thread.
You will need a A9L or A9P (manual trans or auto trans) computer and the wiring harness that goes with it along with some other pieces.