For Rub: In small bowl, mix together chili powder, pepper, allspice and cumin.
For Pork Chops: Using paper towel, dry off chops. Rub mixture evenly on both sides of chops and season with salt.
Set clean, well-oiled grill to medium heat. When grill is hot, using tongs, place chops on grill and cook 3 minutes or until dark grill marks appear.
For Sauce: While chops are cooking, combine orange and lime juice in small bowl using whisk or spoon. Set aside.
Using tongs, flip chops and cook 3 minutes or until chops are pink in center and internal temperature is at least 145 degrees F.