The last time City went half a dozen games with the same line-up was during the 1998-99 campaign.
McLeish has no fresh injury worries or concerns about the fitness levels of his side as they prepare for their third game in eight days.
David Murphy, Teemu Tainio, Martin Taylor and Garry O’Connor remain long term injury absentees.
Birmingham (probable): Hart, Carr, Johnson, Dann, Ridgewell, Larsson, Bowyer, Ferguson, McFadden, Jerome, Benitez. Subs: Maik Taylor, Phillips, Fahey, McSheffrey, O’Shea, Carsley, Vignal.