Above thanks to Robin!
This GMC stack I found on https://www.facebook.com/MotorcycleCommunity?ref=stream the Strangerblog Motors Fan Club facebook page
And Kim sent in this photo... and I gladly admit it's a contender for best stack! Who the hell can find more 3 wheelers to stack?!?!?
found on http://s134.photobucket.com/user/split51/media/cars%20and%20car%20bodies/Mazda%20T2000/MazdaT2000.jpg.html