Manual vs Power Steering Shafts

Does anyone know what is the difference between the 67-69 big block steering shaft and a non big block shaft is?

When you asked the question I thought oops I was referring to the outer column ( jacket) So i looked again. At least in 69 there is a BB specific shaft but not a BB specific column ( jacket)

Screenshot_20251129-090558~2.png



no BB specific column (jacket)
1969 parts book
Screenshot_20251129-090846.png





I checked 67 parts book
Only one manual steering shaft for all engines (power was not an option w BB in 67)
Screenshot_20251129-092019.png
But the column ( jacket) is called out with a seperate part for BB
Screenshot_20251129-091813.png
As for differences, you got me.