Pistachio Ambrosia

Yield:	16 Servings
Categories:	Desserts

2	cn	Fruit cocktail (17-oz. each)
2	cn	Pineapple chunks(20-oz. ea.)
2	cn	Mandarin oranges (11-oz. ea)
4	pk	Instant pistachio pudding mix (3.4 oz. each)
2	c	Sour cream
1		Carton frozen whipped topping (12-oz)
		Chopped pecans, optional