I've seen it on the AD trucks, like my 51. There are four bolts that hold the column to the box. When I rebuilt it I pulled those four bolts and disconnected the column from the box, no problem. I'm not sure if that would be possible in the 55.5.

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi