I found this posi carrier in a pile of parts and need some help identifying the details. There is no part numbers on the carrier that I can see aside from a PAT. NO. I purchased a posi rear end and discovered that it is the wrong series for me to use the shorter gears that I would like to run with my T56 transmission. I could buy this carrier for $100 and rebuild it but I cannot find information anywhere about it. The bolts holding the ring gear had 11/16 size heads. The numbers on the ring gear are "39 10 GM 665k 0". I understand this to be a 3.90 gear but I am unsure if it is a 8.2 or 8.5. I tried to measure the ring gear with a tape measure since it was the only thing available and it seems to measure at roughly 8.25. Any insight? I cannot seem to get photos to attach due to their size.