well it starts going into shades of grey. 3" lift and the wheels will allow your 285's to fit but there maybe a little rubbing on the mud flaps. So take off the mudflaps and do some minor trimming (Longbow has good pics of the trimming) and you got your set-up. The UCA's are not a must but I would recommend them with the lift. I went 25000 miles with stock control arms with everything being ok, the alignment wasnt perfect (wheels were like this \...../ slightly) and it wondered a little but it will work.
Edit: oh fyi, If your hauling your camper trailer thats in your pic alot the lift and 285's will hurt your gas mileage but you'll look good doing it