Yes......Extended Control Arms.....several vendors and brands:......I believe the car needs new longer trailing arms.
The wheels are not centered front to back because the SS is based on the earlier caprice design, which originally had wheel skirts. When they removed the wheel skirts, it makes it appear that the rear wheels are shoved forward, though from what I have read, they are actually centered in the wheel well, just not the wheel well opening. You can push them back either 1/2" or 3/4", depending on which kit you get, but it does alter your suspension geometry.why aren't the wheels centered anyways ???
it there a reason, or did GM mess up and didn't want to fix the problem