I have a D44 (steering) pulled out of a '73 F-150. Weird thing is, it's leaf sprung high pinion with disc brakes. Anyway, I pulled the shafts today and the inner splines (30 spline) on both sides are worn way down. These are the "necked down" axles, anyone know if the F-250 shafts are compatible? Chevy, Dodge? Thanks.