ST. LOUIS — The Blues saved their best for last on Saturday night. After falling behind 5-2, Justin Faulk highlighted a five-goal third-period outburst by scoring with 2 minutes and 7 seconds to play to lift the Blues to a 6-5 lead en route to a 7-5 victory over Chicago in a battle of Central Division rivals. Jordan Kyrou, Jake Neighbours and Brandon Saad scored in a span of 3 minutes and 13 seconds to set the stage for the Faulk goal. Kyrou added an empty-net tally with 61 seconds left. Nick Foligno scored twice for the Blackhawks, who took a 5-2 lead on his second goal just 5:16 into the fin…