Manual to automatic trans swap?

Ok I have a 79 Chevy C-10 4speed Manual with a 350 I want to change it over to an automatic I love the Manual but the clutch and every think is just becomming to much of a pain.My wife also likes to drive the truck some times and shes only 5'1" so the clutch is really hard in this big old truck. So if any 1 knows what parts do I need and How much money am i looking at.I know it should be cheaper than an automatic to manual swap