Witth face on same plane you will obtain with SBridge only something like this!

So you must make something more in SubDModeling! ;)



Here with only copy : Move Faces & SBridge !




Then you can make your Bock in SubDModeling... with again Split + SBridge



So if you want to have the entiere bock in one pass
your cubic object must be a solid without internal face and better if all faces are less 6 edges!
Better less 5 !