What year 8.25 diff / need help ID

Can anyone with expertise in this area let me know what year 8.25 Diff I have in my 67 Barracuda based on pics attached?
Car was originally slant six with 7.25 but has since been changed out to this.
I am going to be upgrading the 3:23 open diff to 3:55 Trac Loc from Dr Diff and need to know what i have so I can get the right Carrier Races.
Plus I just like knowing
Thanks in advance
Fittrjoe first post


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