old fuel line leaking

[biobenzer]

I am the proud new owner of my first MB, a 1983 300SD w/ 205.000 on the clock. I was told that it had a fuel leak when I bought it, but what the heck, life is full of chances. Anyway, It appears that the rubber hoses directly under the tank are funky. I need a complete exhaust system anyway, so I'm going to take all of that off and replace the fuel lines and brake lines.
I would like to run Biodiesel in this . Does anyone have a reccommended brand of fuel line to use? The tank looks like a complete bear to get out of its space. Should I take this out as well and pressure test it? Thanks , sorry this is so long, its my first posting