UPPER STEERING COLUMN BEARING GREASE?

Yup. A lot of older bicycles use loose ball bearings (no cages).
Some motorcycles too.

As far as 67 vs. 68. not the same. I don't reall the differences off hand, but its pretty obvious when you see them.

I assume you've seen this, but if not
1967 Imperial & Chrysler Steerin
g Column Service Book - Session 241
Hey Mattax,
Yeah that manual is a great resource. The accompanying video from the Tech Series is on YouTube as well. I posted another thread on the Steering Forum asking if anyone had used the 67 rebuild kit that’s on EBAY from a vendor in NC. CJRods......supposed to come with the white plastic support, the actual mast bearing, a spring and a collar. $70....