I have air intrusion problems coming from who knows where. The returns lines and what not are all new so I know it isnt coming from there. Instead of tracking down wherever the leak is, I am just going to re do the fuel system. I have been wanting to anyway. I am going to have an electric fuel pump mounted under the truck. Then it will run where the stock fuel water seperator is now. Only im getting a kit from napa and replacing the factory one. Then back over to the filter and into ip. I have a few questions. First, what size are all of the lines? Are they all the same throughout? Should I use braided line or have napa make me up some line? Any tips? Thanks for any input