offset spring hangers and some creative banging or jackine will make the width you need and give you a little room. are you saying you need to trim the front for the height? i have 255 70 15s on my 69 they just barely kissed the front edge on big bumps or turnign into driveways. i never felt it or heard it i nthe car but it was just enough to rub the paint off. no marks on the tires. i made up some 1/4" shim plates to mount in between the front hanger to shim it back. i really believe that 1/4" was all i needed. those tires were 29"x10".