Front or rear. If front it would have to match up with the Ford fenders and MH manufacturers running board if equipped.
If rear, it would have to fit on the MH manufacturers brackets, unless you need the brackets as well. On ours, I replaced the short rubber ones with ones I bought from a truck dealer. $4 each for semi trailer mud flaps. I cut them down to the length I needed, drilled 4 holes and bolted them to the Winnebago brackets. They were only about 2" wider than the ones that came on the MH, They now come down to within 3" of the road ,instead on 6". Provides much better protection to the towed.