I think I ordered for a mid '70's model. They are all the same sheetmetal.
Do keep in mind that the four door Wagoneer will work, but the sill plate is cut to fit around the "B" pillar, so if you have to replace the top sill you'll need the J-truck or Cherokee rocker. The Waggy and Cherokee are a lot longer and leave you enough sheetmetal to wrap the back of the cab corner too if you need that.