94 roadmaster wagon. Any tips on changing fuel lines?

All my fuel lines...send, return and vent lines are very corroded. One is leaking. Should I try to change them all? Or is there a better solution. The one leaking is right at the fuel tank.
Thank you in advance.

I would change all of them while you are under the car. Luck would have it that you'd replace one or two and another one you didn't replace would start leaking shortly thereafter. This is a common problem with many vehicles of this era, especially if you live in an area that uses salt on the roads in the winter. I had to do all the lines, both fuel and brake lines on my '90 LeSabre a few years back, and right now my Roadmaster's look fine. I was lucky enough to find the pre-bent lines at my local dealer, but as time goes on these will be fewer and harder to find, so you might end up having to bend your own. Investing in a good tubing bender and flaring kit is very helpful. The way the lines are positioned under the car leads to the trapping of moisture and then the rusting out of the metal lines.

I was wondering specifically if the is a continous line (3 of them) or are there breaks somewhere? Has anyone changed these before.