I honestly don’t know. My experience is with Orientals, and even that is limited. I haven’t had luck with any coexisting while free ranging (under any circumstances).
Males that weren’t gamefowl were tolerated, as long as they didn’t pick fights.
Your space is likely much bigger, and has a lot more cover and forage options for them. Their ‘wild’ instincts might kick in and they could figure that they can work with sharing the land. I don’t think it would be totally unlikely. Unfortunately you won’t know for sure until/if you try it. I’ve seen a few photos of your gamefowl in the landrace thread, gorgeous birds. I really hope it will work out in the end.
Any mixes here have been able to coexist quite peacefully, so I think even the first generation crosses either the leghorns will be much more agreeable there
