Thoughts on Fuel Line Size

You "go big or go home" guys are gonna slow the car down just with the weight of the excess fuel in the fuel supply!
LOL

For a drag car, yeah, 1/2" would be the smallest that I'd suggest. For a cruiser that big is not margin for small issues, it's excessive and it poses plumbing challenges for EFI. Sure it can be done, but does it NEED to be done? 3/8 (-6) work fine and not break the bank from fittings expense. Also, have you ever looked at the usual EFI pump? It's inlet and outlet fittings are M10. Just how big of a hole can you put thru a thread with a major diameter of .394"?