A Dremel tool with a cutting disk works nicely
Now on the down side if you want an LNE bearing, and your old bearing intact is part of the trade, you have a decision to make. Additionally the bearing carrier you took out of the case is the old style which tended to leak, the new style has a different seal. I think the new one is about $150. And don't tell anybody, but I ran a bead of 5900 case sealant around the outboard edge of the seal before I installed mine as a little "belt and suspenders" for a seal area renowned for leaking. I wonder if that would work with your old style bearing carrier? It is important where the sealant goes. It has to be on the outboard surface of the piece you are installing so none of the sealant gets pushed into the case when you push the piece back in. Additionally any surface you apply sealant to has to be completely clean. No old sealant, no water, no oil. I favor brake cleaner followed up with acetone. In fact, I've got to get my hiney back out to the garage and install my oil pan and new O2 sensor (Thanks Pelican Parts! Great price on this part!)
