OXFORD — When Ole Miss is done playing No. 8 LSU on Saturday (2:30 p.m., CBS), so will conclude one of the more difficult road schedules any Ole Miss team has ever seen. That the Rebels were so young and, on paper, unprepared for such tests was a major cause for concern in the preseason. It is the third road game against a top-10 opponent of the season for the Rebels (5-5, 2-4 SEC), having already traveled to then-No. 1 Alabama (a 33-14 loss) and then to No. 7 Georgia (a 37-10 defeat). There was supposed to be a fourth top-10 road game, but Arkansas has been a total disappointment and lost to Ole Miss in Little Rock.