741 open to 489 suregrip swap

Assuming the 489 setup uses the same sized u joint, no need to change pinion yoke. And you can get a combo u joint that will match small to large if needed.

Assuming your existing setup used oe roller axle bearings and 489 came from setup with same it should be a direct swap

If your 741 was setup for green axle bearings, the 489 will need to be setup accordingly