Ive been searching the interweb for possible rod piston combos for the Aussie 250 and theres a lot of conflicting info out there i found someone who said they used chevy rods. I can see how the crank big end could be turned down and the small ends bushed to suit but theres a big diference in Big End width. From memory the 250 is.990 and the chevy .940(correct me if im wrong)I understand Speedway Guys are doing this maybe someone on this site can fill me in.