xman, there is a member (Nerve_Gas) here with a VX lifted something like 5" - he fit 36" tires. The tires cause problems and the excess lift causes problems. A couple of people have built a body lift for the VX with no evident problems. So I guess you could go up to 8" lift. In either case, I wouldn't recommend lifting a VX that high unless you swap in a solid front axle and can justify the mods needed to do so.