In your shoes I would call Crutchfield and talk to their tech guys. They can not only answer your questions, they might be able to make/sell you a custom harness to allow you to plug & play the setup. Or you could try calling the guys at Five Star Car Stereo and see if they are willing to help, as they do this stuff daily. I know from watching a lot of their videos that they have dived deep into this issue. It's all worth a try, eh? Let us know how it turns out.
