Thanks but at the same time sorry I asked. Responded to you last post before I merged the new thread with the older one that included a copy of your Marti report.
Will see how I can help. Somewhere in the hundreds of other 67 San Jose and examples from the other two plants 9" rearend pictures we should be able to find some other similar or same markings but as mentioned there are one or two on your rearend that are specifically San Jose marks I believe
As mentioned I would search out of at least keep an eye open for 718 elsewhere on things like subassembles, fuse box, seats, door panels and so on.
Yellow daub near the filler plug on those S codes that received that style of third member is typical. Two digit assembler number at the top of the 3rd member is typical also. The second number is sometimes seen but not on all in my examples. Number (typically two digit) on the passenger side of the 3rd member is also typical. Typically a brighter color than the one or two at the top of the case. There was normally a series of letters and numbers on the bottom of the third member directly behind where the pinion retainer attaches. Those are often more difficult to read due to damage from running over things with the car or use of a floor jack and such