I am currently running a ls that I just switched over from carb to fuel injection(Holley Terminator). I bought a tanks inc. setup with walbro pump and new sending unit. I didn't want to mess the old factory tubing and since I had to do a return anyway I just ran all new lines with Earls pro-lite lines and ano-tuff ends. Everything is black, looks great and I didn't have to rig this or adapt that to make everything work.
http://www.holley.com/350004ERL.asp
http://www.holley.com/AT304620ERL.asp
this is the kind of stuff I used(different sizes though)
excuse the mess, not done yet!