[dap930]

Old fuel lines need replaced due to age and the fact that they are not compatible with ethanol in our fuels today. Ethanol will dry rot the rubber leading to cracking. If you can find non-ethanol enhanced fuels then you are OK. There are threads on here where people are replacing braided fuel lines on older carb/MFI 911 with new braided fuel lines from Germany that are not compatible with ethanol because they want to maintain period correctness only to find out it fails in a year or two's time and has to be replaced again. Currently no one makes a ethanol compatible braided fuel hose for old Porsches and VW's.