Why can't you use copper? We use copper on my buddy's f250 8 years ago his is still running fine.
I'm going to have to look into those! I have several applications where those may come in handy!!!Napa's poly coated brake lines are the way to go if you don't want to buy stainless. It's coated with the same stuff they make plastic diesel tanks out of and is copper inside. They have little brochures by the lines and is how I knew about it.
Are you planing on dropping the tank or taking off the bed?
You don't necessarily have to drop the tank OR take off the bed: it is possible to do both the Hutch and/or Harpoon mods by just raising the bed. Here is an excellent write up:
Powerstroke Fuel Tank Modification
Havent actually done this yet, but this is the way I plan to try this . . . when I get around to it!:winking: