I saw this question asked in 2012 but did not see a definitive answer to the question so here goes. The new main bearings I received for my build are little different than the originals. Of the five bearings the thrust bearing is the same as are two of the other bearings. Of the other two one has two oil groves and one is wider than the others. Does anyone know where the odd bearings go. My guess is they go in the front and the rear but I don't know what one goes where. Any information would be greatly appreciated.