I would like to purchase both a 8" or 10" plow and a tiller for my 316. I have located several tillers that come with hitches, hoses and pumps. But the hitches dont look the same as the one the JD dealer suggested for a 316. I have the print out of the hitch, pump and part No's That JD suggested. The Hitch/lift arms will operate off my rock shaft. Its not a 3 point. Also do i have to use a three point hitch with a plow. And lastly what determines the size of plow i will need, ie. 8",10" or 12" I want to increase the size of my sweet corn crop. And doing it all by hand,pick and shovel sucks. Thanks Bob