[ford38v8]

Going back to the subject of the leaking cork gasket, You may find that it leaks fuel when the electric pump is running, but not when only the mechanical pump is running. That is because it is either under positive pressure from the electric, or negative pressure from only the mechanical. Negative pressure anywhere in the fuel system will not leak gas, but rather, will introduce air to the system, sometimes seen as bubbles in the glass bowl. Common sense sometimes needs a little reminder.
For a cork gasket to seal, it must be pliable, which can be easily achieved by soaking it in hot engine oil. A dry cork is most difficult to seal, and can distort without actually making a seal. Lubrication softens it to conform to the mating surfaces correctly. An additional advantage of using motor oil on the cork is when it sits for long enough to evaporate the fuel, the cork is still soft and pliable having been prepped with oil. Don't use any gooey glue, just hot motor oil.