I cant believe the s**t that some people make and expect to work.Anyway what is the solution? If the overall width of the diff is what you want that means the axle lengths may be acceptable (pending where the pinion position is) then all you have to do is a new housing to suit the axles .Iwould only use new bilett bearing ends and thicker retainer plates, what is the deal with the welded on caliper mounts, dosn't it have handbrakes?,best of going back to the standard commodore backing plate if you can fit them between the springs , it can be a relativly simple conversion if you keep it simple and use the standard parts .Brian