When it comes time to install the new rear bearing, I have found it easier to chill the crank in the freezer (put it in a ziplock bag, well oiled ) and warm the R. bearing by setting it on an aluminum pie pan on the burner for a minute or so (on lowest heat possable )...the bearing will slip right onto the crank. You don't need to get the bearing hot...you should be able to pick it up bare handed.

The assembled crank/R. bearing goes back into the baggie, and back into the freezer for 15 minutes or so...then you warm up the case, and the chilled crank/bearing will fall right in.

Doing it this way, there's virtually no chance of the rear bearing going in cockeyed or possably being damaged and while the case is still warm, you can slip the front bearing on the cool crank/warm case and push it into place with the prop driver/nut...then finish setting it into place with a deep socket.