Please help identify sure grip carrier
 

Hello everyone. i went to an auction that had a lot of old mopars and i found this carrier in a pile of iron so i assume it is mopar. the carrier had the ring gear but no pinion:(
there is not much for markings on it, a "D" ? in a square. and a "2" is all i can see on the carrier. the ring gear has, 3723142 321 7 19 79 1. wondering if it is a 8 3/4? how can you tell?
hopefully these picture will show, and thanks in advance for any help.:)

http://i305.photobucket.com/albums/n...carrier001.jpg
http://i305.photobucket.com/albums/n...carrier002.jpg
http://i305.photobucket.com/albums/n...carrier003.jpg
http://i305.photobucket.com/albums/n...carrier004.jpg
http://i305.photobucket.com/albums/n...carrier005.jpg
http://i305.photobucket.com/albums/n...carrier006.jpg
http://i305.photobucket.com/albums/n...carrier007.jpg

i asked in another fourm and was told this was a 8 3/4 auburn style sure grip. was also told you can't buy rebuild kits for these.

But they CAN be "rebuilt".