Jebby thanks for the tool information, just ordered one.

 

You can Google CuNiFer (Copper, Nickel, Iron) to find where to buy it if not at a local auto parts store. It's a little softer than steel. so you can double flare it and bend it with hand tools. Since it's part nickel and iron it is more durable than pure copper. It has been used by some auto manufacturers for new cars (Volvo).
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How to make stainless steel, double flare lines at home with simple hand tools. First find a source of copper tubing that's the same OD as your to-be stainless steel lines. Make, add fittings, and double flare your copper tubing to fit your application. Then mail your custom made copper tubing to In-Line Tube. They will laser scan your custom made tubings, and then their compter controlled tube fabricating/bending machine will duplicate your copper tube in SS and professionally double flare the SS tube. I have Stainless Steel Brake Corporation aluminum calipers. For professional appearance, they need a custom made brake lines that runs along the trailing arms to the aluminum calipers. These were made in SS by In-Line based on mocked up copper brake lines.

 

I recently installed a Holley Sniper Stealth from EFISYSTEMPRO and they sold me a kit with 20' of Earls -6an "Vapor Guard" fuel hose and the proper fittings for it. It is pretty heavy duty stuff yet still flexible. I ran it from the fuel tank outlet to the filters and all the way to the engine compartment. I put the hose inside a Shiny DEI Insulated sheath and then when it got 6' or closer to the engine heat it went into a Silicone insulated Fire Jacket as well. Between the two covers it will not get hot or boiled by the heat coming from above and beneath the Corvette. I will monitor the tubing in it's present location and in a few weeks might relocate or reattach any sections. I was not able to go under the Corvette while working so it is not finalized as yet. This line is much more a finished product and very nice looking and easy to work with.

I used a product which puts your fuel pump in the tank along with the Fuel pressure regulator and I only needed to run one fuel line to the Throttle body. One less hose to have to deal with...

If you were looking to simply replace the original run parts there is a great company up in NY called Classic Tube and they make entire kits with every line pre-bent ready to use. They will make in Stainless if you prefer and they also make brake lines as well as the fuel lines of these Corvettes of ours. They also make SS Braided hoses to connect between the body and the caliper in the braking systems. Any older Corvette would appreciate a new set, the old rubber ones can collapse and possibly cause other problems. I switch both of my Corvettes over to the SS braided lines and the pedal feel IS different and in a great way.

Good Luck and Stay Healthy!