The idler arm is easy enough, but a puller would make removing the pitman arm a lot easier. If you can't get a bonified puller, the right sized pickle fork & a hammer will work. Lacking both of those, you could use a long drift & drive it off working from the top under the hood. (Alternate sides with each hit)
Also check your seal since this would be the time to replace it, if it's showing ANYsigns of leakage.
Also check your seal since this would be the time to replace it, if it's showing ANYsigns of leakage.