I got it done. Had to remove the front drive shaft, remove the bell housing. Since the tranny lines were in the way, I removed the starter so I could slide the housing to the side and out of the way.
The o-ring was a flat round rubber gasket. The new one was three times as thick and round. The paper gasket disintegrated once I touched it. Put it all back and looks good so far. Took 5 hours.