I took the rear blocks out and cut out 1 coil on my 11 f250. unfortunately the springs were off a buddys truck and the front actually didn't go down, couldn't read the part # tag on any of them. well the drivers side went down about 3/4" but nothing on the passenger side. it also seems like the track bar is keeping the passenger side up, as well as moving the axle out the passenger side. it goes back next week to have more taken out of the coils and install the PMF adjustable track bar. ideally id like the front about 1" lower than the back. ill have pictures once its all done.