1971 Duster 340 10" front drum brakes - what other Mopar brake drum hubs will fit?

A-body Small bolt pattern is the only 10" drums that will fit. It sounds like your best option would be to swap over to the later 73+ BBP discs.
Thanks Demon. Swapping over to 73+ BBP discs would require me to also swap out my 10" drum brake spindles for 73+ disc brake spindles, correct?