Hi im running 6" TUFF DOG lift the big advantage with drop boxs is they allow you to get full down travel (no point liftting it and it can't go down )as even with a small lift the old patrols /safaris bind up under articulation !
drop box's also fix caster ,driveshaft vib's,move ya front diff forward, this also helps with driveshaft bind ,
stainless steve made nine , good price and no probs fitting them
been on 18 months of abuse

no prob's ! cheers steve