We have brick running 20 ft up the wall above our fireplace. Our current gas fireplace sits over 2 feet off the ground and we want to lower it to the ground and build a new surrounding and mantel for it. Instead of removing all the brick we were hoping to cover it with drywall and create a "bump-out" wall to give the high wall some definition and cover the ugly brick. Could that be done or would the bricks under the new drywall become unstable?