I’ve got a KZH120G, and to lift it, replace the rear springs with the Hiace Super Custom 4wd springs - they fit, and will give you about 2” of lift for the rear. For the front end, wind up the torsion bars to match the rear. Got an overall 2” lift on mine. I also changed the bump stops to adjust for the lift, and upgraded my shocks as well. Then I got a set of BFG KO2s (LT215 75R15’s). Check out Roamer (Roamernw.com). Those guys are Hiace gurus and they can help you out! They are based in Seattle, WA, and they set me up with the lift. I’m sure they’d send whatever you need to wherever you live, or at least be able to tell you a hell of a lot more than I can. With regards to lockers, I’m looking at that too mate. I believe the ARB air lockers for the HILUX will fit (ARB Part # RD132). Good luck and let me know how it goes!