Rear brake drum problem

Got it figured out. Thanks for all the info. I measured the ID of the drum and the wear area. Turns out it has 11" drums. I spoke to Dr. Diff and he gave me the 4 options it could be. Turns out it is the same shoes as a big body mopar, like a monoco. He told me that was rare on a 74 dart, but it was an option. Ordered the shoes and ready to go. Thanks again.