Aunt Evvy's Barbecue Beans

I found this in one of my mother-in-laws notebooks, with a note that it was from her sister-in-law, Aunt Evvy. It looks like it's for quite a crowd!!!

6 lbs canned butter beans

1 1/2 boxes dk brown sugar

1 large fam. sized ketchup

1 lb. bacon cut in small pieces

Mix all ingredients in open roasting pan Stir occasionally. Bake 350 oven 2 1/2 hrs.