If it's tightly wrapped, it will last for many months.
The shoulder is the front leg and the ham is the rear leg. They will be similar. The front leg is a little more fatty.
Pork neck bones are great for flavoring a large batch of tomato sauce. You can also use them to make a pork stock.
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan