Hauling Capacity of the 1971 Dodge Dart

I like running errands every now and then in the old cars. Picking up a few things at Lowes or WalMart makes me think of the 50 year old history my old cars went through yo get where they are today. It is hard to believe they were brand new and used for this purpose on a daily basis. However, I am going to bet there has never been a toilet in the back of my old Dart. LOL!!!