By Tom Bowles Here’s our expert preview of the AdventHealth 400 at Kansas Speedway, along with fantasy driver picks, Vegas odds, start time, and TV channel as the NASCAR Cup Series returns to the Sunflower State. NASCAR hits the halfway point of its regular season with the AdventHealth 400 at Kansas Speedway. We’re already a dozen races into the life of a Next Gen chassis whose debut has been marked by parity and highly competitive racing on this type of intermediate track. Already, the sport has 10 different winners, leaving just six postseason spots up for grabs. Among the familiar suspects …