Ok I'm looking to turn my stock 87 4x4 4D XJ into something that can marginally keep up with my pre-running friends. I think I'm looking at getting a 3.5'' RE Super-Ride kit but I'm wondering what the 4.5'' would be like and if there will be more problems or things to change out with a 4.5 instead of 3.5. Any help is appreciated. Thanks!