1995 Jeep Cherokee Drive Plate

Engine Performance problem
1995 Jeep Cherokee 6 cyl Two Wheel Drive Automatic

Is there a specific position in which to re-install the drive plate on a 1995 Jeep Cherokee. I removed the engine at 270k and had it rebuilt. I marked the position of the plate on the plate and the engine block, however when it was returned to me the mark on the engine was gone. I did not send the drive plate out with the engine.