I think you can do a combination of things to make it safe(r).
WIRE/PLUG: A short plug may help with the routing. Use a high quality silicone wire and boot. Sleeving it with the purpose made woven glass is a good idea. I have used these sleeves on turbo cars, you can get them at speed shops/catalogs.
FUEL LINE: Use the best fuel line you can buy, then use the idea above - slip it into the next size hose that will fit.
Short Plug link
Silicone Plug wire and boot link
Insulate Spark Plugs, Insultherm Spark Plug Boot Insulators, Spark Plug Boot Insulators, Insultherm Sleeving