Brake Noob

So I just bought a 69 Dart Custom, but it's been tinkered with from previous owners.

I would like to redo the brakes. Fronts drums are stamped 10.090, so those are 10s when purchasing shoes.

However, the rears had no stamps on them or any other markings. On the outer rims of the rear drums measure pretty close to 11in but I thought 11s were not on the dart, so I'm a little lost. They also don't seem as wide as the fronts.

Maybe someone here knows, or can point me in the direction? Oh, also self adjusting drum brake or non for new hardware?

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