Sticking seat belt help needed

I purchased some seat belts from a 74 Duster and want to install them. Most everything works good but the retractors for the shoulder belt.

These retractors keep engaging the stopper no matter how slow I pull the belt out.

I have posted a pic for visual aide. I have cleaned them up very well and lubed the moving areas too....any help would be GREATLY appreciated.

Thanks!

Brian

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