When I first put the drag radials on. I had a stock 56 rear end(60" face to face) with leafs in the stock location. I cant remember if they are 4 1/4 or 4 1/2? Been awhile. Now my 9" is 58.5" from rotor face to face. I am having to use 1/2 wheel spacers to center them. Once the mini tub is done then I will order new wheels.