I used -6an braided w/ hose clamps
Just short runs from the top of the tank to the factory size hardline
supports approx 750hp forced induction application
Same thing on the other end. I prefer the long-runs of fuel line to be hard steel (safety and reliable) and if possible make the short runs easy to access, leave a little bit extra in case you mess the end up and need to re-cut it again.
-6an is pretty cheap now $2-$3/foot so it was only around $10~
If you are not going to use braided hose, make sure whatever you buy is Ethanol compatible, and will stand up to 100psi~ or so.