A coupe things I learned on my install.
The drivers side, if your using stage 8 locking bolts, the hole that attaches the dip stick will have to be a stock bolt.
If your going to run cats you will need rear cat plug extensions.
If your wanting to keep your warranty your going to need your cats on so you can return your truck to a stock tune and removing your tuner if any major warrenty work is needed.
This can vary by location and dealership. My wife's dealership shop manager told me Ram is really starting to frown on tuners.
If possible run 3" mandrel bent pipe from your collectors back. Any sharp bends or crinkle bends are going to cause restrictions in the flow of your headers.
Hope this helps!