There are many discussions on code ?0? rear ends for 67-69 vehicles. Apparently, Ford knew about the issue but made no effort to fix it. When I saw the Marti report I had the same skepticism! My rear end id tag is:
WES-G
3L25 6HD 996
The code on the report should actually have been ?D?. An easy enough mistake in the shape of the letters?
Attached image states only rear ends available for 390 GTA are 3.00 & 3.25.
Human error!!!