i did not need to space out the calipers. the rotor was pretty centered and it works fine. maybe it's because i'm using teves brakes instead?
You used the WJ rotors. I used Ford Explorer Sport Trac rotors that is where the difference is. I liked the idea of spacing the rotor better than redrilling rotors.
I am also using the Teves brakes. The Akebono would have been nice, but there isn't a noticeable difference in performance. Just got what I could find at the Junkyard.