The late model races from the last few years have been nothing short of amazing. Same with the mods at the ump nationals. Last years world 100 had Scott bloomquist go to the tail (around 30th) on lap 20 something for a rules infraction. He drove through the field and won by literally half a lap.
It sounds like they need to prep it different for the sprints, but what they are doing is working for everything else.