just cut em out and put some trailor fenders in....they look better than stock anyways. Let alone, you will PROBABLY (not sure here) have to tub the firewall...
to make it lay frame you got to cut out the fenders to make it lay frame mine lays on 265/40/r22 99 silverado i had to cut into the firewall so that the tires dont rub on it hope this helps you here goes some pictures