Yay, another LJ78! You should come to Lincomb in May [strike:1yg64dh2]so I can give it a going over[/strike:1yg64dh2] so we can compare lol...
A couple of pointers if you plan to off road it - check the front electric hubs work before you get stuck thinking you have 4wd and you don't, they're a common problem point. Switch them from the dash, wait 3 seconds then drive forward a couple of feet, they should then be locked but to check this (without selecting 4wd aswell); jump underneath and try to turn the front propshaft by hand, you shouldn't be able to turn it more than 45degrees or so in either direction. If it spins as free as a bird then the hubs need work, it's not too difficult to permanently engage them and I can do this for you if/when we meet if you have problems.
Other things to sort before venturing off road include cutting the exhaust tailpipe back so it can't be flattened against the bumper, and to move the fog lamp into the O/S reverse pod before that gets obliterated
Very tidy looking truck, I'm sure you'll be very pleased with it
Oh yes, and you will ideally want a lift for those 285s. I'm pretty sure they fit as standard as long as you have enough offset on the rims, but they will probably rub on articulation.
Jim.