Sorry I dont have any pictures for ya or anything... but basically the radius arm is the piece that connects to your front axle, just under the springs, and goes back a foot or two or so, bends in a little, and connects to the radium arm bracket. Replacing the bushings is a major job if its never been done before as you have to grind off rivets, etc. If it's already been done, they'll be bolts instead of rivets, but its still a major task.