Say we win the division -will Saints be the biggest home playoff dog in NFL history?

Not sure about the point spreads for playoff games but did find a site that has the odds of every super bowl. https://www.betfirm.com/point-spreads-for-every-super-bowl/ I was surprised at how many had double digit spreads. The biggest upset was Super Bowl III. The Colts were 18 point favorites over the Namath lead Jets and lost 16-7.