If you're going in the dirt, you're going to want at least 5" of lift, more if you install a particularly flexy long arm suspension.
If it's an auto, you're going to want to regear as well. If you have the manual, you MIGHT be ok with the 4.10 gears. I've got that in my '13, but with 35s and it's fine. I do think I'd regear if I went to 37s though.