Another trick is to slip something into the space behind the jaws of the puller, once it is setup inside the bearing. A socket, bolt, whatever, will keep the teeth from slipping off the ID of bearing. Just be creative.

As for beating it out, well...save that till the last resort. This is a roller bearing, not a sintered oiled bronze bushing like on the 2.8.

Worst case, you are going to have to cut it out. A sawzall may work, but a hacksaw blade will fit through the center. Cut the inner race in two places, pull out the pieces. Cut the outer shell most of the way through in few spots and see if you can't beat it out with a chisel. Be careful not to damage the crank.

Good luck,
Michael