I would use #10 line up to the front of the car then "Y" it. Use 2 #8 lines to go to both sides of the fuel rail. looks & works great. GOOD LUCK with your project.
Weldon 2025 or 2035, Aeromotive Pro. Though both brands of pump are loud, I think the Weldons are unjustifiably loud as well as ugly. i have been itching to find someone running one of the Barry grant King Sumo pumps to see how well it is working. Supposedly a "quiet" pump that can outflow the Weldon and Aeromotives. Single 10 feed is good. Kind of depends more on your fuel rail and regulator setup to decide if you need to "y" the lines. I use a single -10 feed with stock feed line as a return and have no problems.
STICK WITH THE WELDON , I HAVE SOLD MANY AND USED MANY OVER THE YEARS , TRIED THE KING SUMO AND WAS 0 FOR 1
RIGHT OUT OF THE BOX ! THOUGHT IT SEAMED GOOD AT THE TIME . THE WELDON IS JUST A TRIED AND TRUE UNIT
When buying a weldon pump(not sure about every model) but i know the 2025 can be bought in different fitting sizes,Ive seen them #8in #8 out,12 in 10 out, 10 in 10 out.Make suer you get teh one setup the way you need it