Insert meat thermometer so that the tip is in the center of the thickest part of the roast and does not rest in fat. Roast uncovered until thermometer registers 170~F, 2 to 2 1/2 hours. Remove pork and rack form the pan. Strain the drippings from the pan and set aside. Add enough water to remaining Orange Juice Concentrate to measure 3/4 of a cup; stir juice and wine into the drippings Stir in sour cream and salt. Serve with the pork roast.