Before you purchase, you might want to investigate whether getting some offset upper control arm bushings might be worthwhile, to allow for getting a little more positive caster when you get the alignment done.

Additionally, getting some 11/16" tie rod ends and tie rod sleeves might be worthwhile also, to enhance tie rod end safety a bit.

That's why a lot of folks here piece things together a bit.

Some do polyurethane on the UCA bushings (and sometimes on the LCA bushings, as well). Kinda depends on how much you want to tighten things up.

Pressing the bushings out/in usually can't be done at home, unless you have/have access to a hydraulic press. Although there is a special tool kit made by American Muscle just for doing front end parts replacement (getting the ball joints separated from control arms, etc.).

If the idler is shot, might be worth checking the bushings and ball joints - they are common culprits in sloppy steering.

It's likely your cam bolts on the UCAs are okay, so that's four parts you probably wouldn't need anyway.