NASCAR announced four enhancements Tuesday morning to the annual NASCAR Camping World Truck Series race on dirt at Eldora Speedway. The second running of the 1-800-CarCash Mudsummer Classic, scheduled July 23, will carry over many of the same format elements rooted in dirt-track tradition and will remain a 150-lap event, but with a handful of tweaks from last season's inaugural race. -- Qualifying races will be lengthened from 8 to 10 laps. Instead of making wholesale changes to the format after a largely successful first event, officials opted for largely minor enhancements to NASCAR's only national series race at a dirt track. More...