Yours may only have 2 spacers,one on each side.Mine has 2 identical ones(1 on each side),and a wider(longer) one for the pully side.But all 3 of them have a slight bevel on one edge,the opposite edge is flat.Local Indy shop told me as long as the 2 inside bushings that face the bearings have the bevel faced toward the bearings ,the 3rd(longer one) isn't so important as to which way it faces.Hope I'm not confusing you.

 

Maybe I should look at them more carefully to make sure they are both flat Thanks rocket