I am saing the same as they are definantly root bound and need to replanted. Trying to seperate them will kill them both. Think of these like siamese twins now. The can't live without eachother but definantly wont be able to survive so cramped. I think that planting them in the ground would be a mistake as well. I don't believe that the plant in the shape it is in would have the strength to recover from being rootbound. having watering/nute issues, and dealing with new dirt and it's parasites. The only thing that I can think of would be to find the biggest container/bucket/barrel etc you can find and replant it there giving them both more room. The only thing I could potentially see being ahazard is when it begins to flower, it will get a lot bigger and run into the same problem all over again. Maybe the repot, and forcing it to flower indoors on a 12/12 this week may be your only option as to getting anything out of these girls. It is way big enough already to do this... Someone may have a different idea...but that is mine. Read up on lights and find out what you need for flowering a plant and try it....
Good luck!