K-a-double m. Perhaps you see the problem with putting a Kammback on a car with a trunk. I can't find the original build thread, but 2000neon did this:
http://ecomodder.com/forum/showthread.php/2000-dodge-neon-aero-mods-20741.html#post326693
They haven't posted since 201608, but the thread should still exist. In case you can't make it out, it's a Watts linkage. You can't see the connecting arm in this view. The Kammback swings on a long arc and the decklid swings on a short one.