Oh, the lines... I used a # 10 AN supply to the regulator & a #8 for the return. Don't forget a quality cannister filter on the supply line. The carb(s) should have #6 or #8 lines to the regulator. PS.. I have a brand new Hilborn pump & mounting kit for a BBC that flows 2.96 gals/minute@1800 rpm... You don't need this on your setup, but I would sell it cheap