Yeah, you would have a difficult time installing a 68 column into a 67 withouth these things
I did the conversion so many years ago (circa 1979) on a car I sold in 1981, so I couldn't tell you details of what I had done without seeing a picture again. As I mentioned in the other thread, I used a tilt column from a Cougar for that job except I didn't install the tilt-away parts/pieces, just the column and gear box with connecting pieces.
It is possible the wiring connections can differ a little from 67 to 68, you might check into this.