7.25 Rear - Differential Interchange

My experience with 7.25 rear ends is limited to a 1965 I worked on for my Dart. On that rear end,preload and backlash was adjusted using shims per the factory service manual.

Today I learned that there are 7.25 axles that use threaded adjusters to set preload and backlash.

1. Does anyone know when the changeover occurred?

2. Will a differential from a later rear with the threaded adjusters fit an earlier axle housing that is adjusted via shims?