Oh boy do I have some stupid questions for ya. 
  1.  After I pull it out of the oven, do I install the bearing right away? Or...
  2.  Should I attempt to apply grease to the hot a arm bearing housing before I attempt to put the bearing in?
  3.  Should the bearing be placed directly in the middle of the bearing housing? All 4 of The old ones i took out were closer to one side than the other.