Are you worried about fuel volume at all with 3/8" vs the typical 1/2" line or is the image you for the brand? Looking on Amazon they do make a 10an to 2x 8an. Has me thinking about re-plumbing my fuel supply and returns now....... I know the inlet on the pump is obviously smaller than that but I'm wondering if the fuel volume directly at the inlet may help.
Not really, being a street truck still I didn’t want a bunch of lines running all over. If it was a competition only truck I would have done it different.