All I can say is parts are getting hard to find foe those old till Smith's. Your missing the rear guard, I suggest you make something up for it, will chuck some dirt back at you. Tines will have to be matched up as well, or even fabricated. Have a similar issue with a rear tine craftsman tiller I have, same engine so I'm guessing close to the same period of a machine. They were very stoudt built machines and withstood the test of time. Best of luck with it.