Heat the case in a toaster over set to about 500 degrees for between 15 and 30 minutes. The rear bearing will more than likely fall out and you will hear when that happens. Once that happens, it should take nothing more than turning the case nose down, with pliers, it's hot, and letting the front fall out.

Do this outside as the gelled oil will smoke and smell really bad. Also make sure you have removed everything else from the engine. You don't want to waste the diaphragm or plunger if they are still good since they are getting tough to find these days.

John