No room for a conventional bearing puller? They've got some now for
blind holes that can slip between the inner and outer races and pull
bearings out that way. See the MSC catalog. You do have to have a
foot or so working room on the outboard end. A pilot bearing puller
might work and can be rented or even borrowed free from Autozone and
the like.

I guess I'm having trouble picturing your exact setup. If you can't
pull the bearing out because there's something in the way of the bore,
how can you press the new one in?

Stan