my 2 cents worth:
I have a 2002 LS WITH a 3" BL, 1-1/2" t-bar tweak, 2" shackles, trimmed the front fenders as well as the sides of the bumper & with the 32 x 11.5 BFG Mud Terrains the front still rubs at full compression (might just be the 4" flexi Flares). Thats just a hard bump straight forward, nevermind if the tires were turned lol.
Now spacers may help or different offset on rims & don't forget that the rim width is important too. I'm running 15 x 10 Pro Comp Rockers, a 15 x 8 might be a better choice.

All that being said I'm looking at a 6" suspension lift in the future & 33's that'll clear no matter what.

 

It is nice, but I'll tell ya having an account balance with 4 different tool trucks isn't.

Edit to add: I have the AAL, ZR2 bars & keys, 2" PA BL, Cragar Soft 8s (4" BS), 1" rear spacers and 32" Maxxis Bighorn tires. The fenders are tweaked and caster maxed to help rub. I only hit on full lock over bumps, so by adding an extra inch with shackles and some more cranking, I'm hoping to virtually eliminate that rub except under extreme conditions.