best pulled pork ever

It takes a long time for this to be done but the actual prep time is pretty short.
4-7# pork shoulder or roast
Put the pork in a large pan or zip bag and add
1/4C salt
1/2C brown sugar
Pour on enough water to cover.  Let it sit covered in the refrigerator over night
The next morning drain, pat dry and put into a baking pan
Rub in the dry rub and roast uncovered in the oven at 225 for 7 hours You can also use the grill.  Add water if the bottom of the pan seems dry.  After 7 hours turn off the heat and let it sit in the oven 1-2 hours.  Shred with two forks and serve with your favorite BBQ sauce.
 dry rub
1T each cumin, garlic powder, salt, chili powder, black pepper, red pepper onion powder and 1/2C brown sugar.  Just mix it all up in a small bowl.  If you have any left after applying to the pork you can save it in a sealed bag or mix into the shredded pork.