I went outside and looked at it again...

I can't really tell what color it is. It seems to have a lot of oxidation or whatever. I would guess that it's probably original.

It is turned in all the way for sure. Not even a tiny gap. The lock nut is tight against the bolt head.

Just how much play or adjustment is there supposed to be? When a new pin is installed, how many threads should be visible? One, two, more? How long is the rubber part that wears down over time?

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1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5