Jennie is correct about the sizes and settings. This is the challange for old blocks, BOM and exchanges. There just a tad off. So I would think about what you want your quilts to be. Are you trying to create traditional looking quilts that reflect the time period of the blocks? If so, maybe a traditional setting with sashing.
Are they scrappy blocks? Look at some scrap quilts. Or you may want to sort them and focus on a color way.
I would love to see pictures as I have some in a box that I want to do too.