Gas tanks and blocks are still around.Now,those fenders,that's another story.I think I probably have seen only a couple of sets.There were warnings against removing the fenders,seems their primary purpose was as a wheelie bar to keep the tractor from flipping over backwards.When pulling stumps and such you were supposed to run the chain under the tractor,up over the top of the transmission,then down and back again.If you pulled from the rear the pulling point was too high.There were,(still are)a lot of these around here when I was a kid,and every summer somebody would bury the radiator cap in the ground behind themselves.The more pulling pressure you put on that cone clutch,the tighter it bit in.When the tractor started to go over you were not strong enough to disengage it.I had one a few years ago used as a military airplane tug.It had duel hard rubber tires on the rear,and was meant to run strictly on gasoline.The idea was to keep the kerosene fumes out of the hangers.