I only had one column apart on a Dodge many many years ago, and I do not remember how that linkage worked. The switch design was the same.
Given the age of the truck and the really low failure rate of the system you are working on, a used steering column is an acceptable option. Look for a pull-your-own-parts salvage yard. Do a search for "Pull-A-Part" to see if they have a yard near you. I have been to sixteen of their yards. All are very clean and well-organized. Parts are inexpensive, and employees and other customers have always been very helpful and friendly.
Tuesday, March 20th, 2018 AT 2:19 PM