What size brakes?

post #2 sounds spot-on. I think Mopar A-bodies would be the only vehicles w/ SBP 10" drums, and especially w/ the proper center register hole. Re dimensions, go the rockauto. The Centric drums usually have a drawing with most dimensions.

If that rear-end is SBP and the correct width for an A-body, sounds like a rare and valuable part. Check the fender tag since you may have the very desired 65 Dart Charger, and a European member with that name would be interested.