I have a '05 4x4 SE (w/o BT, no auto level). I am looking at a set of front leveling spacers. I want to get the most front height I can get without making the front higher than the rear, keeping it level. From my outside research it looks like this is 3" on the front. Will I have to do anything to the rear? I am looking at black anodized billet aluminum spacers.
Is this all I need? Will this keep me level without causing any mechanical issues?

Thanks