Comment and suggestion. 1st; YOU AND ANYONE RIDING WITH YOU LIFE DEPENDS ON GOOD BRAKES DO IT RIGHT.
Most drums are worn out. The base diameter is 11" and any wear over .060 is junk. My suggestion is to get Les book and do the job right.
I would suggest getting new cast iron drums installed. You can send the drums/hubs to Mel/Randy and get it done.
714-292-8660 or
[email protected]
Les book;
https://www.snydersantiqueauto.com/P.../model-a-books
While you are waiting for you new drums to be done, good time to go over the rest of the brake system and renew/rebuild everything that needs it.