Fuel line question

[CYLFD]

I know there's several threads/ questions asked about what type of fuel line to run but I haven't found the answer to mine.

I'm looking for a little input I'm close to the point in my build where I need to figure out fuel ines. My question is I'm going to run a carb. on my 6.0 lq9 but wanted run the fuel line that would be ok if I ever decided to go fuel injected.

In other words I'm thinking metal line them the flexible stuff with the high pressure fittings BUT don't know if I would run into any problems since it won't be high pressure to start with.

Input appreciated
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