Fuel hose AN6 or AN8

Putting my duster together debating on what size fuel line To run
340 B1 engine About 525 hp I have a fuel Cell in the trunk and was going to run AN6 to the Holly blue pump then to filter and up to regulator then to each bowl on the holly I ordered the AN6 when I got it damn that is small 3/8 so now I’m thinking send it back and get AN8
What are your guys thoughts


You are fine to well over 600 hp on number 6 lines if the rest of the system is up to par.