Let me add to this.
Springs in the driven plate (loose lined disk in the clutch) were painted 
different colors to denote their strength. After 60 years their color is often missing.
Studebaker tried to fine tune the driven disk to their transmissions but rebuilder
 have the same number for all.
All these springs did was absorb some of the shock of releasing the clutch and
 certain combinations of springs worked better than others but it is not critical.
The springs in the pressure plates however were also color coded and would vary
 the amount of pressure needed on the clutch pedal and the pressure on the
 driven disk to prevent slipping the clutch. Various combinations of springs were available.