Dana 60 Identification help

Trying to make a positive ID on a Dana 60 rear. Tube is stamped 602829 2. Pretty sure this makes it a 66 or 67 model year. It also has 517c1 and 527b stamped on it. I assume these are date codes? Anyone fill me in on this. Thanks.

https://www.forbbodiesonly.com/moparforum/threads/66-dana-60.177354/

According to that linik, all 66-67 have that BOM number

Housing was made on 5/1/1967 and the unit was assembled on 5/2/1967