Suspension upgrade?

The Mopar factory suspension is a purdy dang goodun. As mentioned already, I would make sure everything is in good condition. Strut rod bushings and lower control arm bushings need to be inspected closely as both can cause clunking and pulling. Make sure the upper control arm bushings are good as failure there can cause changes in caster and camber. If the parts all look good, including tires, find someone with an old school alignment shop and have the alignment checked.