DON'T turn the drums if they are fairly smooth! The shoes can be relined by good local brake supplier, and be like new. My shop even blasts and recoats the metal part to look like new. Have them riveted if you can, I have seen new linings come unglued on bigger trucks. The cast number on the cylinders is your best ID, but not always the part number, but close. Sometimes rear of one truck, can be front of another on the cyls.
