Well u came to the right place. There are many theads on this forum the address your wants. There is a recent in the section with a guy with the same q's. I think that you need to decide what size tire u need. At 31", you will definately need a lift. On my old hunting rig, i did a spring over with 31's. But i had to regear the t-case. The tcase has a high range reduction. I also put a rear locker in it. Let us know what size tire you want.