Are you serious ... 1/2"? At first I was running the original 5/16 and when I put in new 3/8 line and pickup I didn't notice any improvement with the fuel starvation problem. I've never seen a 1/2" pickup for our cars, just 5/16 and 3/8. I don't think I ever had any fuel starvation problems when running a Holley either with their large bowls. Q-jet is a different story.