New to Mopar A bodies
Sounds like someone swapped an A-Body 8.75” axle into the car maybe? If so, those are fetching pretty big dollars now a days. Make some money back on the purchase or get some BBP axles and run it.
Rare car, 1 of 586 based on one source.
There is a thread with a running tally of those on here started by me. Not in a place to link to it right now, but will later if someone doesn’t post a link sooner, or you find it on your own.