OK so I bought a 90 Cherokee with a 4.0 automatic 4x4. It has a ford 8.8 rear end under it. It has disc brakes with coil springs. My question is where and what kind of springs can I put under it? It has a 4 inch lift and I want it taller like a six inch lift. Can I just swap out the coil spring to a taller spring. I was told some people put tj spring on them. Any help would be great. Thank u

 

And I'd like to lift the front higher also. Same thing just swap out to a taller spring?