1974 Dart Sport 489 Differential Question

Thanks everyone for the info. Yes the axles are the big bolt pattern as have the original Rallye wheels with largeacorn center caps. I did find a receipt where the axle stud plates were welded up and re-drilled by Moser in 1993 so I assume the axles are not original. I have a lot of receipts of this car but no info on the differential other than a 4.10 ratio gears installed in 2000. I have since replaced that with a 2.94 for better economy and hiway cruising.