Early Series 1 Tie Rods

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Is the area marked with red the area that should be either 105 or 115?

Yes, except measured from the other side (bottom). It's tricky to do because you have to measure from the projected centerline of a tapered hole. It took me a while to figure out where to measure from, to make sense of 105mm & 115mm. I would never pass a Nissan math test. I expected yours would be 115mm but over a period of 40 years who knows for sure what changes could have been made.