Thanks guys, you always get me to think about what I am doing and I like that. A lot. I decided on the steel hardline because it is easier to work with then the stainless and I have had bad experience with the braided hose. I just don't like to run it the full length of a vehicle. Short lengths at the pump and carb are okay.
As far as rust is concerned, the steel line will get routed, the ends assembled, everything cleaned and then powder coated. I am not worried about rust. The van will never see any conditions to have to worry about it. It will definetly be kept clean and the lines will be run in channels we are going to build into the old rails so it will be well protected. I really doubt there will be any issues with it.
Mark