8-1/4 pinion depth shims

The earlier 8-1/4s used them between the case and the outer race but sometime around 1976 (IIRC), the 8-1/4 shims went between the pinion and inner bearing race. I've heard of mixed reviews of swapping to carrier break in the 8-1/4's due to the difference in pinion location. But the preferred way of setting the the pinion is the smaller shims for the pinion to bearing and using an old bearing honed out just enough to to slide on and off of the pinion for measuring the setup. The new bearing is pressed on with the correct shims once you determine proper shim setting. Both styles serve the same function but arrive to the endpoint differently, either by moving the entire bearing assembly in the case or moving the pinion in the bearings.