I'd say that the one's winning the races are spending more than what they could win on any race they go to. Not every Sprint can racer has the money to run with the one's who could win. Mostly the top 10 in all of the races are spending more to win than they can win. This makes for lots of also rans who just run for the fun of racing which is also plenty expensive for having fun. I see that the 305's are gaining racers from being burnt out racing with the big dogs. I also see that some of the 305's are very fast and could give a 410 a good race when the track slicks off. There are engine builders out there that can make a 305 engine very fast if the racer wants to pay the price. So it is a never ending thing of spending money to go fast.