Agree with Tom on temp, don't cook it more or it would be better for shoe leather.
Check out this link for recipes:
Pork Loin RecipesOf course I'm partial to the one I posted:
I like this oriental style because it is a strong flavor to enhance the weak pork flavor.
1 cup soy sauce
1/3 cup sesame oil (yes, this has to be sesame)
6 cloves of garlic, chopped fine (to your taste, more is even better)
1 tablespoon ginger (ground)