just went through the same thing on mine last week. you have to trim about 1/2"-3/4" off the front edge of teh pad where it butts against the windshield. you've got to be very brave to that let me tell ya. trim it from the bottom side of teh pad and try to keep the angles the same. trim a little at a time and keep checking the fit as you go.
trust me, it's scary as hell to cut on the pad but it's the only way to make it fit. i bought the cheap pad trying to save money, guessing you did too. i've heard the ford tooling pads aren't like this.