Ford Nine Inch Data Plate

[blackball-13]

I am new to the forum and hope that someone can provide assistance.

I have a Ford Nine Inch rear end and would like to decode the information found on the data plate attached to the carrier.

The First (Top) line shows:
WDM-AG1 3GA

The Second (Bottom) line shows:
3.00 9 . 344A

I have searched the Internet for something that will help me to decode the data plate. Although I have gained a wealth of information about the superiority of the Ford Nine Inch, i have come up empty with a accurate decoding.

Thank you for help.

[67mann]

http://www.fordification.com/tech/rearends_ford01.htm