Originally Posted by spinlock
Welcome to the forum! The majority of brackets that come with any lift kit are to correct the geometry as much as possible back to ideal conditions, since many of the critical angles are modified when you add the lift. The brackets that come with the 2.5" kit are designed for a 2.5" not a 4.5" so they will not correct the geometry completely and if the 4.5" came with any brackets it may actually make things worse.
You want a axle side bracket that corrects roll center. Ideally slopped down from back to front.
Here's TF's version with multiple heights.
In a perfect condition (rear lift height and hole used match) the axle will be centered. More important ... Flatter/higher is better. Look at AEV/MC. MC sells the track bar and bracket together. AEV supplies a custom length non adjustable track bar. Both have bends to help clear the exhaust and set HIGH roll center in the rear. This is how you want it.