Help Decoding Differential Tag?

[horseballz]

Hi Folks,
A friend is willing to give me a good 8" rear end that's under a 66 conv and the spring perches are tad too wide for it as well as overall width too wide. After I relocate the perches it should be perfect for my 68 coupe. Can any one tell what it's originally out of? I'm assuming, 3.00/1 open rear
TAG:
Top line:WD(or O)W-B(or 8)
Bottom Line:3.00 7E8 839
Thanks for the help,
Gene

 

[96 DOHC Cobra]

WDW-B. 3.00:1 open. According to my Hollander book, it's 66-69 Comet, Fairlane. The date code (7EB) makes it a May 1967 assembly.