My fuel lines and fitting on my 6 pack set are 5/16's. However the fuel line and pick up is 3/8. My question is should it be 3/8's at the carbs? Car is a 70 barracuda that I am installing a 500CID stroker and six pack (replacing my tired 440). I want it to look correct but also want to avoid any fuel starvation issues....Thanks

3/8 up from the pump to the distro block and 5/16 to each carb. You should be fine. I'm running the stock lines. However I'm having some braided 3/8 made up soon. I have a local hydrolic place make them. Way cheaper and better looking than that cobbled together stuff you see online.

That sounds correct for stock....never caused issues for me when I was racing a high horse 440 back in the day. The tri-power Vette's have the big line all the way up to the carbs....so the bigger fittings are available.....although the lines and the inlets are different on Vette carbs.

here's a pic of a 3/8" steel tube set-up i did for a 6-pak. it isn't as easy as one would think.

5/16" after the fuel pump is plenty for even a 6 pack.imo

Discharge line on any pump should be one size smaller than the suction.

That is sweet. Thanks for the replies.

Yuck - post some picks when you get those lines. i've thought of doing that to.

here's what I've done so far, the rest of the line will look the same.