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

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?

yes, you'd need to swap the spindle as well as the upper control arm or use an upper ball joint adapter (the 73+ spindles use the larger ball joint)