Unless you have a death wish, move the lines. One wrong move and the arc will blow right through the line, and if gas is on the other side, oh boy! Spraying water on the lines is not going to help, the arc don't care and after a few seconds, there won't be enough water left on the lines to even make a difference with splatter.
This is what I would do. Take the clips loose and get it as far from the frame as possible. Be careful not to crimp it but, the more distance the better. Then wrap a couple of old towels around it. Soak the towels and then keep them wet while working. Of course, keep the extinguisher handy and keep the area clear in case you need to move in a hurry. Make sure there are no fuel leaks or any vapors before starting. Maybe a strong fan blowing away from the weld area (in direction going from weld area toward tank) for a minute or so before starting to clear any vapors, then turn it down low (and maybe move it back a bit) while welding. You don't want the fan blowing your shielding gas away, just gasoline vapors. Always be over cautious when welding anywhere near the tank or fuel lines.
Russ
85 K30 CUCV, 350 TBI, TH400, 205, D60/C14, 4.56 Locked
Some day: 4" lift, 44" tires, massive cutting, shorter wb and rear overhang.
