4uall wrote:when i had my issues http://wwwe.fiatspider.com/f08/viewtopi ... =9&t=17531 I came across a post of someone who had run them completely underneath their car. I was not able to find it for you, but will keep searching.
I'd be wary of using stainless steel unless you are used to working with it. It can be brittle and does not like being bent sharply. Go to a ship chandler's shop and you will see that any sharp angled bends in s/s boat fittings are actually cut and welded for that reason.
It varys with what type of stainless, 304 and 316 are the common 'types' but there are a range of others for different uses. All your fittings should be the same type (number) too.
Better off with "Bundy tube" which is a plated (inside and out) mild steel tube made for such uses. It solders readily as the plating acts as tinning and brass fittings are compatible. You can use copper tube but is expensive and a bit soft if it gets bumped, it can flatten. NEVER use brass tube as it work hardens with vibration and WILL crack.
If you are worried about rust, once you have the tube bent to fit, pull it out and coat it with "Tectyl" or similar waxy rust proofing. Give it a day or two to harden than reinstall and touch up any scratches.
i ended up buying a six foot section of fuel line (metal) and carefully shaped it to match the old one and installed it using rubber wrapped clips that screw into the body. it was just long enough to shoot it out the firewall in the front and out the rear floor location. it actually looks factory and now i don't have to worry about the interior flaming out on me. (at least not from a fuel leak)!
I just pulled my fuel tank / seats / carpet and am in the process of replacing the fuel lines. I think I'm going to stick with the original routing, but use one length of rubber fuel tubing for each line instead of messing with the metal lines for in the cabin. Maybe I'm wrong, but I don't think it'll be that unsafe.... still have sometime to think about it, need to patch up the holes in the floor first :>
i read that thread and it was quite entertaining! its funny to see some of the people talking out from between their posterior cushions like Ace Ventura with statements like "no auto manufacturer has EVER run fuel lines through the interior. Fiat must not be included because they make art, not autos! rust prone, rattling, sometimes glued together peices of art! but art none the less!
that doesn't happen on this site because we feed of of each others specific intelligence. we are all naive in certain areas and savants in others! so it works out like we are one big community Brain!
I always find it funny to see guys on forums argue with each other as to who is more right 
