7 1/4 to 8 1/4 rear end Swap

Hi there,

I'm planning to change my 7.25 rear in my 72 Duster for a 8.25 I took out of a 74 Dart Sport. Since the gears are different (2.76 vs. 3.21) I know there must be a speedometer gear change for accurate speedo readings. Besides that, do I need to change parking brake cables, driveshaft or anything else? Any help is highly appreciated :cheers: