I have a nice set of Iroc 16x8 wheels I want to put on my 82 regal during winter storage I want to know what size adapter is needed to clear the rear frame. My fronts are a 225/50/R16 and the rears 255/50/R16 I just love certain O.E.M wheels I plan to get a set of t type wheels or grand national wheels for my regal in the future.