I had to take the tank out of mine, even though mine was still 1/2 full. It was a pain but it had to be done, as all the other times i had hit it to get me to where i had to go when it didnt start made it just not want to go anymore!
Good luck is all i can say, but its a lot easier to take the tank out...
EA Fairmont Ghia : 3.9L MPFI, 2.5" cat back sports exhaust, K&N panel filter. Pioneer head unit, pioneer 4" three way fronts, Pioneer 6" 3 way rears, 2x 12" subs, blue interior light.
My main pride and joy : '76 XB Fairmont GS, 250CI, 140,000 Km and all stock.... for now! (Factory air-con on the way)