It more about to get the ball joint out but I know do it. i don't know if they are pressed or bolt in ball joint I did the work before on my mothers avenger but that's bein years ago so I can't remember what they were if that make sense
It is a whole arm assembly rockauto.com has them at a pretty decent price. I had to do my lowers when I first bought it, other than contending with NY rust they are easy to change. Mine is an early 98 model there were changes in the last 98-99 production run so be careful of what suspension parts you get. Suggest you look up the parts there, it will help "jog" your memory, as they usually include pics of all their parts.
Easy job. Hardest part on my lowers was the bolts into the subframe due ton NY RUST, was afraid they were going to either strip out or snap. But with careful work all went well! My uppers are still orig. and doing fine. Friday I'm changing the front struts(blown out). Got a KYB strut kit that includes the upper mount bushings and jounce stopper for $116.00+ shipping from rockauto. Also replacing my rotors and upgrading from semi met. pads to ceramics(lot less brake dust)!