1972 Duster Build with my Daughter

You're all wrong.
That's the f@ckit bolt.
If the car is assembled correctly and you know it. Drive it.
I haven't done a car yet that didn't have a can full of f@ckit bolts.
Trust your knowledge.

I have found more instances in my experience where the "line" screwed up and forgot to put a fastener in than I have where I forgot to.
Restos are detailed hand built cars.
Trust your knowledge.