Fuel system good enough for 525 hp?

I have almost the same setup as you. 408 525+ hp. I run the same tanks inc pump and fittings with 6AN feed and the factory line as the return and have no issues at all, works great.
I have almost the same setup as you. 408 525+ hp. I run the same tanks inc pump and fittings with 6AN feed and the factory line as the return and have no issues at all, works great.
Do you remember what type of line you used? My issue is the inner diameter of the particular brand and type of 6AN line I want to use is smaller than most other 6AN lines due to the thickness of the ptfe core. Looking around I saw From .312 ID to .340 ID. Just don't know if it's enough to make a difference. Your info does sound encouraging. This car won't be raced at the track but do need enough fuel flow to keep from starving it the least bit at wide open throttle.