Is the factory 5/16 fuel line big enough for a 750 cfm carb?

I went from 8:10 1/8 et with 5/16 to 7:90 1/8 et with 1/2 in fuel line!! Everyone combo is different.. I would never tell someone that the up grade in fuel line diameter was a waste of money. You never know till you do it. If you pickup some et great. If not, you will the bigger fuel line if you ever want to go with a faster or bigger motor.. great question