it all depends on how you want to do it.
IRO, KOR, RE and a million other manufactuers sells springs of all sorts of sizes.
if you want to do it right you will need control arms, again IRO, RE, JKS and some others make them, you will need sway bar links, and track bars. this question is broad and there are endless possibilities. i reccomend going with a kit and adding to that if you need to.
also it is nice to have your info in your sig. even if you are stock you could be as basic as mine.
1993 Jeep ZJ. 4.0