Yes, you could put the roos inside the existing run, in their own private coop/run set up. But, this is the key: Will you be able to do so while ensuring that your pullets/hens each have 4 s.f./bird in the coop and 10 s.f./bird in the run AFTER you have deducted the 4 s.f. in coop and 10 s.f. in run from your run space that you are subtracting to give the roos adequate separate space?
Simply subtracting space from the hens/pullets will create a new problem of aggression and blood shed if you don't allow enough space there. And if you don't allow enough space in coop/run for your males, they will beat each other to death. They may do so, even if they have plenty of room.
Also, are you and your neighbors prepared for the non stop month after month, and year after year crowing contests that will ensue? Roos start crowing an hour before sunrise, and often crow frequently during the day.