Yes, your steering wheel lock pawl is broken.
When I did this job on my '71, A dozen knocks with a hammer and punch drove out the roll pin, and off came the lockplate. Unlike some GM columns, this lockplate clearly served no purpose other than to lock the steering wheel when the ignition is turned off; it didn’t act as a crucial spacer or anything, so I decided it wasn’t going back on. That meant no more need for the pawl arm that engaged the lockplate; I removed two screws and the pawl arm, spring, and retainer came right out. I noticed the pawl arm had a central pivot point and a wear polish on both ends, and quickly discovered it served not only to lock the steering wheel, but also to lock the gearshift. No qualm losing the shift lock; my ’65 didn’t have it and the era of 4-door Darts being common theft targets ended decades ago. Plus, if someone is gonna steal it, I rather they do as little damage as possible so repairs, assuming I get it back, are less extensive.