I bought just the part you gentlemen pointed out from NPD. Does it fit? Yes. Does it belong there, now that is the question. I didn't see any evidence that there was one on any of those columns, however with that said: The picture with the frame pivot is indeed a small block vehicle, based on the location of the frame pivot, yet lacks the seal. Do they just slide from the tube and rot and fall off, or do they not belong?
I'll eagerly await an answer so I can make a command decision on if to use the rubber in the end of the tube, or not....
-Keith