I have a set of magnesium sidebells for a champ quickchange. From looking at them it does not appear they were ever used or ran on a car. You can still see the DOW 7 finish on them from the factory on the front and back from over 50 years ago . The current drilled holes are for the torque tubes but they are all setup from the factory to drill them for early ford axles as well. PM or email craigibc@yahoo.com with any questions! Craig