I would be getting a my dremmel and a bunch of small 1/16" cutting blades and get cutting at the frozen race, cut through as far as you can in 2-3 spots then use a small chisel/punch and tap the cut lines and it should crack the rest of the way through the race, then it will probably be loosened enough to beat it out with a brass drift/punch .....it will come out with a bit of work. ;)