Gas leak / Rusty lines

Hello all,
I've got a significant gas leak and it seems to be one of the 3 rusty steel lines that runs from the top of the tank (access panel) to the rubber hoses near the leading link on the drivers side. Anyone had this problem? Is it possible to pull these steel lines without dropping the tank (and the exhaust, and the diff, and the ...) I'm thinking about just running rubber lines and replace the steel ones later.

Comments?

92 pearlie
Collins