Inner primary chain case advice for 54 Model 7 with swing arm

Check out the attachment.

I believe that these are from a Model 7.

They appear to match the diagram in the Model 7 Parts List Book. 1949 to 1954.

The photo shown in Phil's reply are from a single i.e. ES2.  The Model 7 has a larger hole to fit onto the twin's crankcase.  You can see the case in the attached photo. 

Philip Ham

Attached is a photo of the only inner primary case I've found to fit prefeatherbed Dominators. Note the bent bracket at the top to fit the hole in the engine plate. As the rear chainguard is independently bolted to the swinging arm, the inner case doesn't need the more usual horizontal bracket at the rear where the rear chainguard bolts on to on rigid and plunger frames.