Hey FarmVille Legends! The NEW and improved Special Delivery Boxes are already available to some players. Hopefully they are on a slow roll out and will come to your Farm soon.  Below are some images from a Farm to show you how the new SDB’s work. So this could be pretty exciting. Basically instead of opening boxes and HOPING it gives you what you want, it seems you now have more control the destiny of the box!
 
As you can see from the below photos, you can easily see that it lights up all your buildings that could use parts (that are found in the Special Delivery Boxes), and tells you what it will give you if you click on that building, and I assume it even shoves the parts in there.  Talk about a grand improvement.