Super Bowl IV was in unfavorable territory, Super Bowl VIII was against Don Shula's Dolphins, who was undefeated the year before, IX was against the Steelers, and Tarkenton shat the bed that game, and XII was against fucking John Madden's Raiders. If the Vikings had made Super Bowl X, they could have won that year, but instead the Cowboys won via the Hail Mary that should have been offensive pass interference.