How would you fix this NP208?

[jcramsey]

Just bought an 85 K5 with a messed up transfer case. PO somehow snapped off the end of the threaded rod that connects the shift linkage to the transfer case body. Not sure if there's something going on internally with the case for it to be so bound up to completely shear off the end of the rod. Wondering if I'm gonna have to open it up and put a new rod in or if this is something that's fixable externally. I don't mind a short term temporary fix just so I can get it in 2wd for the time being. Maybe drill and tap and then weld a screw in place so I can turn it with a wrench?