Well, I got the main bearing out after heating the 40 C-case in a 350 F oven. The front bearing would not come out, even after heating to 400 F. There is no way to get behind it to pull it out and the banging on wood did not work either. I even tried using needle-nose pliers to pull it by gripping the inner race with no luck either. I am re-heating the engine at 400 F and will try again. It is the front bearings that were bad on these engines, so they have to come out if I intend to use them.