This isn’t an unusual situation especially since the parts manuals from that era reveal almost nothing about hose routings. As long as the routing change doesn’t interfere with any moving parts, isn’t routed too close to exhaust pipes and is secured to prevent abrasion and provide support it’s my opinion that you are free to route the hose as required.
According to the preventive maintenance tasks listed in Part 43 Appendix A para C 22 you as the pilot may replace prefabricated fuel lines. Since that is approved it’s assumed that it’a also legal to unscrew the end fitting on your existing fuel line, re route it and re attach it to the fuel pump.
However, even though it’s legal, the line end, called a “B” nut must be torqued to the proper value during re-installation. My advice is: If you haven’t done a preventive maintenance task before, get your certified airframe and powerplant (A&P) mechanic to show you how the first time.
Savvy mechanics know to always take photos of an engine installation prior to disassembly or engine removal. The photo will be the only reliable guide to proper re-installation.
Happy Flying]
Steve
