why replace the upper arm bushings? replace the arms. it's harder to pay for but FAR easier to deal with. and you're going to have new lower joints, anyways.

you will need the ball joint press to install the new lower joints. to remove the joint takes a big vise and 2 hammers-shudder! 1 ball pein small enough to leave on the joint while you whack at it with another, bigger sledge. shop teachers who read this are shaking their heads, screaming NOOOOO! good luck, chuck.