Well I do like Barkingdog's idea about giving a bath, it can't hurt, but I don't think it's going to fix your issues. These are both extremely large dogs with potential to seriously injure or kill each other. I would strongly recommend professional advice in settling them in together.
I've got an older dog and two new pups, but my two came in as puppies, not year old dogs. I wish you luck with this, I am not going to offer any advice as I really feel I am not qualified. Just based on the breed I again suggest a really good professional trainer give you some advice.