I have heard of it being done with just a two in lift, but we were not able to do that. As in the White Rabbit build there is not enough clearance at back of wheel well for 33's (which is what 285/75's are). A body lift will provide more room because the back of wheel is higher where it would meet the tire. Moving the ball joint forward is moving the wheel forward and giving you the clearance needed.
Another method of moving the ball joint forward is to chop the frame as Mike Hagen does and slide the entire front suspension forward (he moves his 4 inches, and it provide 4 inches of lift).
http://Kreator has a lift that replaces the strut with a Fox coil over shock and I believe his new A-arms also move the ball joint forward.
When I went to 33's I bought a set of used 33's (that turned out to be barley used) for $100 to experiment with and see how much it would take. A set of rollers that won't provide much traction may be a good investment over getting 33's and figuring out that the power loss is not worth it. There is going to be substantial power loss, and higher gears are hard to come by (and their asking price reflects that).