What are you guys running for fuel line on these dual carb applications?

I was planning on -10 from tank to pump, -8 from pump to regulator (two port) and -6 to each carb (3/8" hard line to each bowl). Would I be Better off running a four port regulator with -6 to each bowl? Carbs are 4150's and the combo should make 700-750 on pump gas.