Wait, it has a 3" body lift? If it does I would seriously consider lowering it. 3" body lifts are actually kinda dangerous. The put a whole lot more stress on the mounting bolts and there have been cases during wheeling where the bolts have sheered from the stress and the tub just slides right off the frame.
A BL is one of the easiest mods you can do for a Jeep. Though I personally would couple it with an equivalent motor mount lift. That way you don't have to worry about notching your fan shroud, or tub for the gearshift.
But as stated above you can get a body lift for about $100. I'd personally not go over 1.5". If you absolutely have to have a 3" lift (can't imagine why) then I'd definitely be using grade 8 bolts to secure it.