wow. no offense, but for $500, that thng looks like a HUGE project undertaking. I paid $500 cash for mine, and just needed new wheel bearings and an oil change plus battery. plus its road legal. that thing, again, no offense but it looks like a wreck to me.
I must agree, ditch that homebrewed square stock rollcage nd get a good one, some good bumpers, better tires, the general stuff to make it useful offroad. I think for most general offroading, 4hi is plenty sufficient, considering how low the gears are set up stock on this little bugger. oh yeah, adjust your valves. go by the sticker under your hood, if its still there. it'll save you money, and really just takes like an hour to adjust them, if you're going slow, or 20-30 mins at a normal pace.