Rear diff question

My dad has broken a couple axles in his 8" rear in his 65 ranchero. Considering how light the car is as and the lack of weight over the rear, that shows how weak they are. I wouldn't use an 8" rear in an A body mopar if it was given to me. In my opinion, you're better off selling it and finding an 8-1/4, 8.8, etc.