The worst that can happen is it doesn't work. It can't hurt to try. Try exporting the neck as a MT and applying it to Eve. If that doesn't work, you may have to do some magnet work on the neck. You might also try emailing Yamato for input on this. S/He might have an idea or two if the necks are not compatable. I also know that Masa has done a lot of morph conversions for Eve, so he might be able to help as well.