Fuel problem I think? Going Crazy

[stanger66]

the gas tank was replaced 8 years ago, and my friend stored it 2 months later for 6 years with about 1/8 of a tank left in it. i drained it last year and flushed tank out through drain plug in it came out clean.
Somebody told me that if put bigger lines it would probably help with flow. And worsed came to worsed I should put a electric f/p and regulator for more fuel dump.

Basically I trying to make this realiable to drive as a everyday car so I can sell my tbird and a new car.

The 6 cyl is going to be in there until I can collect all the parts to put the 302 efi in it and all upgrades.

Fuel filters weren't clogged except for 1st one