There are a lot of variables to using urethane in the lower control arm bushing as all manufacturers seem to take a slightly different approach which may or may not require further mods to the bushings as well as possibly reusing shells, etc. Simple route is just use stock rubber bushings to avoid all the pitfalls of urethane.
To rebuild the front end you would want upper/lower ball joints, inner/outer rod ends, strut rod bushings, upper/lower control arm bushings (offset upper bushings installed opposite of the instructions to maximize caster), idler arm, and possibly a pitman arm as well. The PST kit is decent, but you probably don't need the upper control arm adjuster cams and the tie rod sleeves. However, I bet they include these jus tin case they get trashed in the rebuild process. Personally, I've never replaced them in most rebuilds I've done.
However, before just replacing everything, you can assess if everything is still serviceable by going through some basic analysis. The service manual does outline all the means to check these joints forexcessive play. The looseness in the steering box could very well be the stock mopar over-assist, or a slightly worn gear set that could be tightened with the adjuster nut. How long have you had your Cuda and has it always felt this way since you've had it?
