Paper gasket on the center cases? That's very strange, I wonder if that's why some of those engines grenade and others don't, hard to get a consistant torque/preload on the bearings with a paper gasket in the middle. I'd imagine that you'd want to be super specific on the torque values for the case when you put it back together.
Be sure the safest rule is that we should not dare to live in any scene in which we dare not die. ~Lewis Carroll~