People do this a lot, usually successfully but occasionally there are disasters. Before I give specific suggestions I'd like to know in feet how big is your coop. How big is your run. Information on how they are set up could really help. So could photos. How old will those chicks be when you take them outside (assuming you are brooding them in your house)?
There are plenty of generic type things we typically suggest. House them side by side for a while. Have multiple feed and water stations set up. Safe havens/panic rooms can often be useful. A really big issue is can the younger avoid the older if they need to. That's why how much room you have and how it is laid out is so important. Quality of the room you have is important. There are tricks you can use to to improve that quality. Can you give us more info so we better know what you are working with?