im going to get asked a similar question when people see in my boot, i have a pretty 'sik' carter pre pump that flows way more than i need
the reason i have it is because i got a very good deal on the pre pump/main pump/surge tank as a package so i will just use it.
anyway back on topic, are EFI fuel lines that much more expensive than the stock ones? i would have thought you would pull out the entire fuel system except the fuel tank and replace it with higher pressure lines?