There’s a lot of unknown when it comes to Iowa Speedway after it underwent a partial repave, but Kyle Larson is embracing the challenge. Larson, who sits on the pole for Sunday’s Iowa Corn 350 Powered by Ethanol, said he believes the newness of Iowa Speedway will create more opportunity for teams who haven’t found their way to Victory Lane thus far this season. “There’s still so much unknown,” Larson said, via Claire B. Lang. “So, I think that’s exciting for race fans and even drivers. There’s probably more drivers in the field that feel like they have an opportunity to have a good run because…