Ford F-250 Line Replace/Remove

Just Bought A 96 F250. It Wont Start. Previous Owner Said He Was Backing The Truck Out Of His Driveway And It Stalled. He Thought He Ran It...

On The Front Tank I'm Trying To Remove The Large4r Of The Two Fuel Lines,,,i've Releaced The Smaller With My Pvc Lisle Relese Set,however...