Replacing Drums and Shoes on 69 Dart
I would call the nominal size 10 x 2.5 for the front.
The rear looks like its the same as used with the disk brake option, nominally 10 x 1.75
I happened to know the rear takes 331 shoes.
Can't think of any reason to buy shoes from year one.
Not unless they had original p/n and that's what you wanted.