I was crew chief for a Legends racer who ran the Summer Shootout at Charlotte because he could rub elbows with big name guys. It was frustrating because he refused to spend the money needed to compete there. Those cars are spec, so everything has to be just right or you're getting lapped. Those cars are also fragile - any hits and you're replacing parts and / or needing a trip to the frame jig. There are guys with complete ready-to-run backup cars - if you give them too much competition, they will wreck you and just switch to their other car for the feature. And this was in the Masters class that doesn't get much airtime.