Depends if you want to drive like an idiot or not. If you own a 2.85L 6cyl I dont think you need to worry about doing burnouts.
It depends on want you want to do in the car and the driving you do, if you want to try to do single wheel burn outs around corners stick the 4.11 in,
If your wanting a reasonable combination with a more spritly takeoff without sacraficing top end too much consider a 3.45 or 3.55. If you have more money to spend put in a 5 speed with a 3.45 or 3.55,even a M76 would probably hold up behind a 2.85L and would be pretty cheap. This wouldnt affect your top end at all.
Else even consider a gearbox swap to either a MC6 4 speed or M76 5 speed it will give you a better takeoff than the aussie 4 speed. NB the MC6 & M76 boxes cant handle a great deal of torque but behind a 2.85L I think you would be pretty safe.