Earlier WD boxes were different for the different front ends. Later ones and I think all 45 boxes had a flange on the bottom that either a narrow front end, single wheel front end, or linkage for a wide front end, bolted to. If you have a flnage on the bottom you can probably bolt on any front end they made. Look on the front of the steering box and see if there is 3 or 4 holes for a large piece of metal to bolt on that would extend down to support a wide front end. The back of the wide front end piviots on a bracket bolted to the cross member that supports the front of the engine I think. I have a parts book and if you have questions I can look them up for you. e mail me if you want.