Offset shackles

Yes, it requires hangers, shackles, and cutting and re-welding of the perches.
Sorry thread dig, i have a 8 3/4 we are shortening and using the off set shackles on, do you move the purch exactly half an inch from original location on diff? I am using the dr diff set. As my car is in a shop and diff being built elsewhere so cant mock it up