[Fast92RS]

I have worked on many old gas trucks from the 70's and earlier eras and I have seen many of them have copper fuels lines. They are even on many old firetrucks that I have worked on and they have taken a beating and there has been no issue. They were used as fuel and coolant lines and in some cases oil feed lines. I guess it also has to do with the wall thickness of the copper. I don't thinks its a big deal for a low psi carburetored application.