PINION won't budge

I’ve had the pinion bearings wear into the pinion on GM axles before. The pinion drops into the groove and nothing gets it out. Was told by GM that vibration causes the wear.
Anyhow the heat seizes the pinion to the bearing. How about using a torch and cut it out? The roller bearing will come out with little effort if you heat the cage up and loosen things up a bit. Since your gutting anyhow.