I have a Ford 9" Traction Loc 3rd member for 31 spline axles. Can this be changed to use 28 spline axles? I'd like to use it (in my '48 F1) in a '71 F100 rearend that has the 28 spline axles. The '71 has the right hub-to-hub length, and the spring perches are located for direct bolt-in to the '48.