playing around swapping springs is a pain, the ranger springs is a redneck way of doing it, they dont fit right and shouldnt be driven on the street or at any speed.
a cheap and safe way to get 2 more inches is to do spring spacers, jeff and mudchild both sell very nice setups.
but if you want to do a spring swap, grand vitara front coils fit up front, give 2-3 inches of lift, rears fit out back but dont give any lift, still will need spacers to level the truck out.