Ok, I have run into a snag and though I would post it here hoping it helps both Aaron and I at the same time.
I bought the BCB fuel line kit and it comes with the 5/16 and 3/8 connector to a 3/8 barb. I then bought the spring locks for the fuel rail but the barb on them is 5/16. So I obviously don't have a tube that can take a 5/16 on one side and a 3/8 on the other.
So I started looking at the stainless steel braided lines and switching to -6AN.
Doing this, i found what I need to go from the fuel rail spring lock to AN fitting, and the tubing and the hose ends for the tubing, what I can't figure out is what to do on the fuel line side. The lines already have a line nut on them which I understand are 5/16 and 3/8 . Is there way to go from those to -6AN?