Cutting A833 Input Shaft Question

That is the type of bearing I’m using is the one that goes into the convertor register. I’m a dumb redneck from Wv. But not dumb enough to try and drill a perfect hole that would hold a pilot bushing/bearing laying on my back with a drill. Lol. I wanted to just make the existing hole a little deeper so I didn’t have to remove as much of the shaft