Stop in for a cup of coffee

Maxcustody said

Question for the experts……Since I am making everything reliable and safe for the Dart, brake lines, brakes etc. I figured I should change out the fuel line as well. Cheap insurance. Is there any reason not to change it? Also can I use a flexible line instead of the old hard line? Not sure yet what size fuel line I have.

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I wouldn't change anything that doesn't need to be.
Its a false economy. 95 % of the new stuff isn't made as well as the old stuff.
If it has a soft wall or leak, that's anothe story.
Hard line the whole way. Steel or stainless steel. Cooler, stronger, lowest friction.
It's generally pretty well protected the way the factory ran it. I can't think of any location that got armor (coil).
Frame in the engine bay can sometimes be a bit close to headers (that's an issue on my 67 but no one else has those headers)