Back in my younger years, I worked as a Ford tech. MFG did not recommend drilling the rivets. Thus, we were not permitted to do the grind and drill method. It is actually quite easy to do the pull method. Disconnect the shock, disconnect sway bar, and loosen the coils spring retaining bolt. You do not have remove all of the way. Simply loosen enough until you can spin the spring and remove from the coil bucket leaving the lower end attached. Loosen the radius arm nut, use a big pry bar to move the arm forward and using down pressure to 'drop' the arm out of the bracket. Replace the bushings and use pry bar to lift up, back, and then in and reassemble. If you are not experienced or are uncomfortable with the pry bar, use a come along to pull the axle forward. Hope this helps. Once you get the hang of it, 15-20 minutes a side.