your truck seems pretty set up with the lockers and gears. 4" lift is fine. i would be worried about those 31" tires. 31"s you might have problems with ground clearance no matter what kind of tire tread it is(swamper, mudder, a/t). also with 4.88s you can run 33-35" tall tires.
you might worry about snow right now on the con...i don't know how much is up there if any.
happy trails
rich *ruger*
