I recently acquired an older Schwinn springer fork in a trade. I went to install it on a 1959 cruiser frame, and the steering tube is too short. I don't think the tube has been cut, it has plenty of threads on it, I've done a little research, and I've read that pre war Schwinn frame have a shorter head tube than post war bikes. Does anyone know if this is true? I really want to use these forks, they have a nice patina to them.