American Valley Speedway hosts a wild night of racing. QUINCY (June 20) – The American Valley Speedway was in action with a good field of IMCA Modifieds as well as Hobby Stocks. And the Dwarf Cars made their return to after a two-year absence. After the dust settled on the IMCA feature winner Mitch Murphy, who at first battled with Jeff Olschowka, said. “He pushed up, did the same thing as I did and let me get underneath him again. That was the fastest line around the track so as long as I stayed on the bottom I figured I