Fluker will be drafted to play RT, he is no where near the athlete that Glenn was and completely lacks the feet for the LT position. He'll go late 1st or early second because RT's don't get drafted too early.
Could he play OG, yes, but he has little experience playing there and may take a year or 2 to reach even average production. His agent will also resist the move because OG's make less money than OT's including RT's.
And proud of it!!!