Before anyone has a cow!!!
The differential is SUPPOSED to be offset like that. The pinion is exactly 1.000 inches set to the right in the car. As such, the engine is set 0.500 inches to the right to help straighten out the drive line. It is supposed to be like that. You would not believe the calls we have gotten over the years with people wondering why our engine is "crooked" in the car.
Trying to line the tunnel up and all the other parts and giving clearance for everything was a major challenge.