I' have a 1949 6400. Ive been driving my old girl way more since the 12v upgrade and finally figuring out the carb issue. I'm thinking the front tires might be fifty years old. And looking it. I called my small town truck and farm equipment tire guy and he couldn't get a 7.5x20 tire anymore. Is specialty tire of America the last place to get these tires? I should have got them 10-12 years ago. I think they were only about $150 each back then. Haha