Everything looks good, especially the sheet metal for that old of a tractor. Considering the cost, I usually just replace the fuel shutoff valve, all present and foreseeable future problems solved. Have done quite a few 20, 30 and 35’s w/fuel valve problems, inexpensive solution. One 35 I did had atrocious bushings, I finally had a machine shop remove mine, he pressed the new bushing in also. I usually get too heavy handed and end up creating more problems, so I just had the shop take care of that one problem. Almost any and every part you need is available for your tractor. And so much easier to work on than the new models. In all likelihood be very satisfied with your tractor, will last a long time if you take good care of the old girl.