INDIANAPOLIS (AP) — A new rules package for Indianapolis Motor Speedway provided visibility issues for drivers. More troubling for NASCAR, though, is that after nearly five hours of practice Friday, there was little indication the changes will produce better racing.NASCAR, in its effort to improve the on-track product, is using four track-specific aerodynamic packages to see what could be a better fit for the heavy stock cars. The package used two weeks ago at Kentucky was well-received by the drivers, but NASCAR switched to a high-drag setup for Indianapolis, where passing has always been difficult.“Hey man, this is a big event for us, it’s crucial that this event goes down as a good race every time we are here,” Clint Bowyer said.