With bracket lifts you must run the spindle and sub frame bracket together. They will not work without one another. You would need to switch to a standard 4" lift spindle if you wanted to get rid of the bracket lift.
Dammit I knew they were designed to run together just wanted a for sure from someone who knew or tried it lol. Eh I'll just keep my bracket lift and throw bilsteins on it.. gotta save some cash and buy one of your guy's kits! Anybody wanna buy my PC lift lol