Is it a loin roast? If it is, I like to rub with horseradish and spices, smoke to an internal temp of 140 - 145 and let rest for a bit before serving.
PORK ROAST WITH HORSERADISH AND HERBS
1 (2 lb) pound lean boneless pork rib roast/ loin roast, all visible fat removed
1 teaspoon prepared horseradish
1/2 teaspoon dried marjoram, crushed
1/2 teaspoon dried basil, crushed
1/2 teaspoon dried oregano, crushed