If your tractor was a true steel-wheeled version (the steel wheels were not later add-ons), you'll also have the heavy rear hubs with the four cut outs, the wide rear fenders and the taller-than-normal air cleaner. Those were items that were unique to steel-wheeled Bs during the war years. To the right person, such parts are probably worth quite a bit. Search this forum on the term "steel wheels". There were a set not long ago on ebay that went for about a thousand dollars if I recall correctly. That might have included the front steel also. I can't remember.
My '42 B was originally on steel. Dad got rid of the steel as soon as he could in favor of rubber. My B is a working B so steel wheels wouldn't be worth anything at all to me. Quaint but not practical for general purpose use. For collector's show queens however, the situation is different. I wouldn't be in a hurry to get rid of them. Some will pay outrageous prices for things others would just get rid of as scrap iron. The key is to know the difference.