Thank you!
On top of each single freewheel tooth are in new condition two edges, these edges are ~ 1,6 mm away from each other. On your first image one can see that these edges are much closer together, maybe 0,6 mm or anything like that. Also, at the right side of each tooth, one can see a tiny part which is pointing upwards, that is the leftover of the initial tooth profile and the rest of material was worn away by abrasive particles, picked up by the belt.
Well, I’d say try and see 