I have a custom post type for which I want to create either a meta box or an ACF field. The user can then specify three posts of the same post type to be featured on a page. The links have to persist between posts, what I mean by that is that if I declare post a, b, and c to be the featured articles, and I hit save, I want to be able to go to a different article and see the same three choices in the box. That way I can always be sure that there will be at most 3 articles featured on the page.
Is this possible?