Here is my professional opinion on a chip. Fords quality control on these motors is junk! I have seen the timing chains vary from motor to motor. One motor can have the timing slightly advance while another motor in the same year can actually be slightly on the retarded side (more so with the 4V then the 2V) They dont care as long as it runs. I have seen cars run better with what I call a "cookie cutter chip" then I have seen the same chip on another car absolutly make the car fall in its face with a chip like that. Those chips make power by adding timing and leaning the fuel mixture out. Deffitnally not the way to go if your doing a power adder. So what I tell people spend the little bit of extra money and get a custom tuned chip specific for the car (which we can provide)

Just my .02 cents on this matter.