2-3 pound pork loin, you can use a larger one
1/4 cup Sucant or if you allow it, Splenda Brown Sugar or Brown Sugar in the Raw
1 Tbsp Chili Powder
1 Tsp Garlic Powder
1 Tsp Onion Powder
1/2 Tsp Black pepper
1/2 Tsp Chipotle Pepper
1/2 Tsp Cumin
1/2 Tsp Ground Mustard
1/4 Tsp Cayenne Pepper
This is not too spicy, you can certainly amp it up by adding more of any of the seasonings.
Mix all of the ingredients except the pork in a bowl, rub all over the Pork, cover and place in the refrigerator for at least 3 hours
Spray grill grates, Heat Grill to high, reduce to medium low, Place fat cap side up on the grill and sear for 15 minutes or until you see good grill marks, this will add a lot of flavor.
Remove from grill and cook in a sprayed glass or aluminum 13x9 dish in the oven on 300 for about 2.5-3.5 hours, check it in the middle to make sure no pink remains. I can't give a closer estimate due to it will depend on the size and thickness of the pork loin. About half way through, you will probably need to add about 1/2 cup to 1 cup water to the bottom of the dish.
Slice and trim the fat. I actually do not eat the fat, but I do use the seasoning on the fat to season each bite.
You could cube it after you remove it from the grill and cook in a large glass dish to decrease cooking time and to allow the seasoning to spread throughout the meat.