So I am a bit insane when it comes to modding and I have recently went through and fixed all the item id conflicts. I figured since I have it I might as well share it. I can't say it's perfect but it's definitely better than if you just tossed them together. Also these configs are based off of FTB unleashed and non of the main FTB configs are edited. If you run into any problems let me know so I can fix them.
https://www.dropbox.com/sh/ibsdewom0mrm10a/Y4FV7fwsmz
https://www.dropbox.com/sh/ibsdewom0mrm10a/Y4FV7fwsmz