2 different 10x1 3/4, 8 3/4 backing plates?

Looking at part numbers on rockauto, shoes are unchanged from 64-72. Brake adjusters change in 68 or 69. This means any adjuster kit will work on any backing plate/shoe. Ford 10 x 1 3/4 shoes are identical ( I’ve laid them next to each other) to the 68 and earlier. In fact the adjuster parts and springs are mostly the same. I will attach photos of the assemblies.