Different laws different states then. In GA a bill of sale is all you'd need for a car that old.
With the Government, isn't that always the case.
If you call Missouri DMV, I bet they will have the info you want.
I've talked to them, ran off a bunch of copies, Sworn affidavit on why I can't produce a title, Bill of Sale, Odometer reading, any known leins or titles in other states, Inspection from the hwy patrol, Appraisal from KBB or NADA, then a surety bond for 2x that amount. Then maybe you can get a bonded title for 3 years. If no claims are made the Title is Clear.
The paperwork makes it sound easy.
