IOWA CITY, Iowa — Recent history showed that top-five teams, including Michigan, have struggled at Iowa’s Kinnick Stadium. Adding to that, the Wolverines had lost their last four games here, dating back to 2009. Despite beating Iowa in a blowout last December in the Big Ten championship game, Michigan coach Jim Harbaugh sounded the alarm this week, reminding that this is where “top-five teams go to die” and cited the Hawkeyes’ bruising, opportunistic defense. But this time, No. 4 Michigan overcame the Kinnick ghosts in a 27-14 win despite the Hawkeyes threatening in the second half. The undefe…