Feed and return metal line.
runs in factory frame location.
I had a small leak 50 miles ago, I fixed...well not good enough as fuel line blew off.

where the lines are, seems problematic from factory

I'm wanting to run an. Lines front to tank?. As I'm concerned of fuel/ fire

 

If by "AN lines" you mean braided stainless, well, the factory steel (or better, stainless) lines are a much better choice. Braided stainless lines are just rubber hose inside a stainless braid. I've had the rubber go bad and leak, just like any other rubber hose. Solid steel is safer.

 

If you buy Braided hose with teflon liner the gas wont attack it, but it is more expensive than regular braided. I got oversized( 1/2" ) stainless fuel line, prebent, from Right Stuff Detailing.