I believe I have the clutch parts from the 1972 I parted out.
Hub has the part number 256-16371 and basket has part number 256-16311. The pressure plate does not have any number I can see on it.
I did compare it to the pressure plate from the 1982 and see the 1982 has splines that mesh with the splines of the hub but the pressure plate that I believe is from the 1972 does not have those splines.
If interested let me know. Located in Central NY.
I could attach pictures in needed.