print design - How to have full bleed between two facing pages Indesign

Aloha all,

I'm working in InDesign CS5.5 on a master plan document.

I want the final document to be 11x8.5 landscape with facing pages, spiral bound to allow document to lay flat with full bleed. I have set up the document with legal size paper 14x8.5 so I can have full bleed and the printer personnel can cut to size.

My question is related to the spine edge. How do I set up my indesign file to have two facing pages that have the bleed lines at perimeter but allows a single graphics in the document to bleed across spine? I know, confusing, I'm struggling to articulate it. The basic point is that I want an image to bleed across the spine of document, but how do I do that in indesign without having to copy the image twice, i.e. place it once on left facing page, pull the extent over the bleed just enough, then copy the image to the right facing page, and try to manually match up where the image stops on the left and begins again on the right.

I have attached two pictures for reference.

Any questions to my confusing question?!