My Camaro is a 70 but I know it doesn’t have the original diff in it because it a 10 bolt posi with 3.73 gears. The decoding numbers don’t make any sense. On the front of the passenger axel housing is stamped PS G62742. That doesn’t match any info in the decoding section. Is it possible the diff is out of a nova? Anyone have any ideas what this diff is. I have included some photos.