I have MII suspension on mine, The kit only came with box plates about up to the cab and that was it. I boxed my frame all the way to the rear, I don't know if it was necessary or not. On the side note If I would do it over again I would have clipped something else on or done a complet e frame swap, I got it good now, but it seems like it's a very finicky set up, I have a lot of hours into it making a drive right.