This is why I am so hesitant to post my experiences and to offer help on this board. There is always someone who twists what someone else tells them, when they haven't done it themselves, but tells all that I am wrong. Jack said that the optimum backspace with a NORMAL notch is 5.5 on a 10" wheel. That doesnt mean that you would need to relocate the frame to gain another 1/4" clearance. What it means is that you would need a fairly deep notch (past the seam). With that tire you will be doing quite a bit of work to the inner wheel well also, It may actually need to be moved a little, you will have to see.