Mis-read/understood the shock part of the question then, my fault!
2" is quite possible with a re-index and a crank of the torsion bars, UCAs are upgraded as the ball joints will sit at a strenious angle depending on the amount of crank done and sometimes quite hard to align as well.
JGC coils have mixed results, there's a thread on bich ones are optimal (as their were many options on JGCs I believe), some people get 3", some 2"... I got about 3" when I initially put mine on but time and the addition of an external spare tire carrier sagged them about an inch for me
Brand dependent I believe a 265/75/R16 is *about* a 31 in height which is a stock optioned size for a wd21.
And the bumper on the pictured truck (again, truck belongs to member "Precise1" and is not mine, just anexample of a 2" lift on 31s) is an ARB brand one with modded mounts to fit his bodylift correctly