I would like to find a older chisel plow to do soybean stubble with and maybe plow some disked corn stalks. We have a 330hp 4wd and was thinking some where between 25 and 30 foot. What kind do i need to look for. I have never been around a chisel plow bigger than 15 foot. Is an IH 55(i think) a good chisel? Did John Deere have a good one? Thanks for the info.