Here's what I have on my 68 Chevy Truck..
[IMG]http://thumb1.webshots.net/t/69/69/4/97/22/2791497220102070401VtEpub_th.jpg[/IMG] [IMG]http://thumb1.webshots.net/t/60/660/7/2/19/2756702190102070401lELKOa_th.jpg[/IMG]
This column is out of a late 70's early 80's truck.
and YES I do know the nut is NOT on that bolt.

Here's 3 pics of the complete shaft but out of a GM Car.
[IMG]http://thumb1.webshots.net/t/68/68/2/72/34/2621272340102070401PaPHEm_th.jpg[/IMG] [IMG]http://thumb1.webshots.net/t/24/665/1/24/79/2453124790102070401bGYzez_th.jpg[/IMG] [IMG]http://thumb1.webshots.net/t/60/660/2/17/4/2809217040102070401HvShmf_th.jpg[/IMG]

Only by taking yours apart will you be able to tell IF you can use something different OR modify a later model part to work. But regardless it can be done....Joe