FSM procedure is to cut the races off the current bearings, work the retaining collar over with a chisel to relieve the press fit then pound or press it off. No heat wrench! Then press the new on. Slight warming of the new is supposed to help (eg 200 degree oven).

I have a (simple) press... and have gladly paid a machine shop that has done this before $50 or $75.

Also, if you want, you can keep the taper bearings with discs. Dr. Diff's kits work with either type bearing.