May have a hole rusted in it i have seen this before on older and newer stangs, if its a hole just replace dont even waste time trying to fix it.I forgot to tighten one radiator hose, so that was leaking. Fixed that real quick, but we also found a fuel leak that I have not investigated yet. The weird thing is the fuel was coming from the driver's side of the tank. The lines are on the other side.
Hopefully it's an easy fix. I have been wondering why my fuel pressure wouldn't stay steady, but when ever I ran it up on the jack stands I never saw a leak. I guess putting a load on it and the fuel sloshing around would make a difference. I will report back with my findings later.