I pulled the injectors on my 84 today to replace the seals. When I look at the diagram in the Bentley (24.23) it appears that there are two O rings to be replaced. When I pulled the injectors I am only finding the one that the injector sits against. I have posted pictures of the injectors and the single O ring that I have removed so far. 
http://www.thebrands.org/modules/gallery/view_album.php?set_albumName=greta-the-great
Is there a larger one further back that I am overlooking? I checked where the O ring goes in and there are no fragments there. Maybe when I get the kit tomorrow it will make more sense. 

Owen