Which 8 3/4” SBP Drums and Hardware
Up to you. There is a reason that the factory changed both the bolt pattern ( the larger pattern has less stress on the wheel center) original used with a 13" sized rim.
And the l/h, r/h stud setup was not used in 1972. 7/16" rh only. Torque to 55 ft lbs.
How much of the rest of the car is "correct"?