Your Avatar looks like 30 - 31, which came with 2 tooth.
Is this box in the car a two tooth or a 7 tooth?
P/N A-3527-T you say you will order is for 7 tooth 28-29
One place they show A-3527-T as this part.
https://www.snydersantiqueauto.com/o...etainer-w-tube
Photo here shows 7 tooth part.
Here is what they call A-35
68-T
https://www.snydersantiqueauto.com/s...sing-end-plate
This is a two tooth part.
It would be too bad to wait for 2 tooth part and get wrong one!!