After a little modification, it will. You have to shorten the hexshaft on your header and add a bearing to the end. Then you stick the drive shaft on, that fits on the hex shaft and has the spline for the combine on the other end. Your JD dealer has this conversion kit. The hydraulic hoses fit. If you want all the gadgets and gismos to work, than you have to adapt the wiring harness, too. On a flex head you would have to change sensors to be able to set ground pressure.