Tom, I just finished this change to my 06 38' Monterrey. I had the jackknifed couch on the passenger side and the sleeper on the DS. I tried to just remove the jackknife and put in the recliner. However the slide floor is not wide enough on the PS. It is wider on the DS. So I removed the jackknife couch and moved the sleeper sofa to that side, then added the swivel recliner. It works great that way. I added some floor molding to give it a finished look. Also added a small end table.
Steve