Front Drum - 727 Pump/Stator Support Question

(1) Does anyone make a billet steel front drum that's compatible with a 70-older pump/stator support, or do they all use the wider bushing?

(2) In a 70-older 727 TF, can one simply replace the pump/stator support with one from a 71-newer 727 TF in order to utilize a 'wide bushing' drum?

Thanks!