I'm onto my second 4wd using suspension stuff kits and will continue using them. Best part about the springs is that they don't sag, once loaded up they still perform perfectly and you never have to worry about springs falling out once flexed up. My old 4wd had 4" coils 6" front shocks and 8" rear shocks and I could never get the springs loose enough to fall out, Only extended bump stops by an inch.
Cheers
Cheers