You'll never be able to fully use all of the travel, even the 14's. You MIGHT be able to get very close if 1) your arms are flat or very close to it at ride height (ie, non-stock mounts) and 2) you aren't using bushings.
You're not fully thinking this through. What good is all of that travel if the rest of the suspension can't support it? Do you realize how steep the control arms will be at full droop? Do you understand that your anti-squat will just continually rise when drooping? If you want to be able to run CO's, I'd first focus on building a proper suspension, determining the maximum amount of travel you can squeeze out of it, and then going from there. If you haven't done anything about the link mounts and are running stock control arms, then absolutely no way.
Regardless of how you set up the suspension, links and link mounts, I wouldn't even attempt to run over 12" of travel on ~16" arms. That amount of travel can work very well and I highly doubt you'd ever need more than that.