I'm sure this has been asked but because of the volume of threads on here I can't seem to find what I'm looking for with what I'm working with. Have an 87' Sierra, fuel injected 305 I'm yanking out and putting in a 5.3 LS with 4l60 tranny. I'm determined (cause it's cool and it currently works) to keep my dual fuel tanks working when the swap is complete. I've heard a myriad of things about how to do this. I have a returnless system, truck intake. Can I use the stock fuel lines and just get new fittings for the new pumps and corvette regulator or do I need to replace all fuel lines? Basically, can someone who knows this well help me out from the tank all the way forward to the intake? My buddy used this site for his build and I've learned a lot. Thanks in advance guys!!