Probably the easiest thing to do is use the column from the truck (car?) the chassis came from. If it is not a tilt with cruise etc, hit the junk yards to find one or spend the big bucks and go with an Ididit or similar.
As far a wiring, a Painless or similiar harness assembly made to go with the late style column would be fairly easy to do and likely safer than splicing two + harnesses together
