I'm curious as to: 1) Why Henry used Terne metal tubing for fuel lines, The lead-tin coating is resistant to fuels and since the fuel and the environment cannot get in contact with the steel it is very corrosion resistant 2) How were terne metal fuel lines manufactured, I think they are a rolled multi layer tube, Specific to Ford, I don't know. I do know that there were terne finished sheet available (still today) and the lead acts like a lubricant when forming. The fuel tank insides were Terne finished.)Can someone suggest a source to read more about Ford's development of Model A fuel lines? tHANKS.