Thoughts on Fuel Line Size

Hv vacuum pump to 2 gallon surge tank up front somewhere, walbro from bottom of surge to carb/efi, return to top of surge and then another return from near top of surge to tank. This minimizes high pressure line to only the surge to carb/efi. Low pressure stuff everywhere else and no fuel starvation, ever. And you can keep your 5/16 stock feed line