As Iulian (@smartiot) says, it is unimportant whether the code base is that of the SteemIt condenser or the Busy frontend.
If someone from @busy (such as for instance @fabien or @ekitcho or somebody else) would like to contribute a guide on how to set up the busy frontend to work with a private steem blockchain, we would be very happy. I confess I find the Busy frontend to be niftier than the Steemit one :-)