When doing these how wide should I put my legs? Should it be as wide as my box squat stance or my sumo deadlift stance? Also should I spread the floor like I do when I do box squats or sumo deadlifts?
When i do them, I do them in my sumo stance.
There are all sorts of variations on the good morning, depending on your objectives. Clint Darden posted a video on this a while back; check out his YouTube-channel.