In a covered grill, arrange preheated coals around drip pan (or follow manufacturer's directions for cooking over indirect heat on your gas grill.) Test for medium-low heat above pan. Place meat on grill rack over drip pan. Cover and grill for 1-1/2 to 2-1/4 hours or until meat thermometer registers 155 degree F. Remove roast and cover with foil. Let stand 15 minutes before carving. (The internal temperature of the meat should rise 5 degrees F upon standing, to 160 degree F.)