I am assuming you are speaking of a suspension lift. To do it right you will need a SYE and a custom drive shaft. Possibly a motor mount change too. Different rims or big spacers will be needed to run those tires or a lot of washers on the steering stops.
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up Skid.