my e body was doing 10's with a stock tank but i had to run lots of fuel to prevent it sucking in air after the launch. by the time i shifted into 2nd the fuel press guage was at 0 & it would splutter then come back to life. that sputter cost me the win everytime. at the time i was running a holley blue by the tank on stock fuel lines but no return. any improvement in line sizes has to be a good thing but it can be done on stock sizes, just need a full tank of gas to do it. your upgrade on sizes is what i'm running now & no fuel issues to date.