Fuel hose AN6 or AN8

I ran a blue Holley pump with 6an from cell to reg to carb on my sb stroker. It worked ok. The pump was so loud I couldn’t stand it! So I got a quick fuel 230 pump and return reg. I run 8an from cell to reg and to carb. Plus quick fuel filters. 10an return to cell. That’s what they recommend. Works great no issues. Pump is 10 times quieter! 410 stroker ported w2’s solid roller, and I street it.

You guys are forgetting , his is a street car to start with .
I built a 406 sbc vega street car, best run was 10:28 , I had a holley pump , 3/8 fuel line to a reg up front , then 3/8 to each end of the carb/850 double pumper, I always reworked any old brass fittings I used.
All the chevy boys advised me to put a bigger fuel line on it , I did , ''no improvent'' . They then said I needed a return type system , I did it , ''no improvement!"
A good fuel system , w/ no sharp bends or corners w/ good venting for the cell or tank , and the right fuel pressure will work '' up to'' a very hard hitting / hi horse power car , if well done .