Hey Jim.
That pesky little washer is a real bug-a-boo, and has been for years.
Probably one reason is that many of the stock ones did not have the exact same washer. My '71 original had a completely different setup in fact. Been too long for me to remember the differences, but it was definitely different. And that was back in the early '80's, so they'd already changed the design for the replacements.
But I seem to remember putting mine against the draglink when I first installed it. Just made sense at the time (that or I read the Moog instructions maybe?) and worked fine.
Obviously, if yours had been against the tie-rod and worked as well, with the rubber lasting for many years, then it might not be as important enough to worry about.
Has yours been in there a long time? Is it the same design, or a variation?
According to the recent discussion it seems to go against the draglink side. And that side might be more prone to the metal moving in weird directions on the rubber, whereas the tie-rod side stays more consistent against the rubber? Not sure.
It's probably just there to keep the rubber washer from "walking" and squeezing out and then finally spitting out as it eventually splits and separates. That's just a guess of course, but it sounds legit to the voices in my head.
Regarding the tapered hole for the draglink on the tie-rod's centerlink, neither vertical or horizontal. More of a 45° angle upward and forward. Sort of aiming it at the bumper.
If you have your original stock type still around, just look at how Ford did it and mimic that.
It's not critical that it match exactly. But it should be close.
There are plenty of variables now, what with all the custom additions and changes to the suspension height that we deal with, but keeping it at somewhat of an angle like the original will reduce (or completely eliminate) the tendency of the tie-rod to want to "rotate" during transitions in the steering.
Reducing that rotational movement makes for a more direct steering feel and performance. It also reduces the amount of long-term wear and tear on the tie-rod ends.
I don't have a picture, but I believe some have been posted here recently that will show what I'm talking about.
If you have your stock one laying around, check it out.
Paul