that Mitsu is off topic <img src="/forums/images/graemlins/wink.gif" alt="" />

but you can use the front lift shackles for a solid axle Toyota p/u on the Mitsu rear springs, a helper spring to increase the arch (but harsher ride), and Gen II Montero upper control arms to provide some additional lift up front

I have run 33" tires on my Raider with no mods, but don't know if your brother is already doing so