When I put the Torker 383 and 9801 TQ on my '67 Newport 383, the rear line to the carb was easy enough to make with a simple tubing bender. Just had to go slow to get the angles right as it transitioned from the carb to parallel to the valve cover (per OEM routings). This was before all of those things were in repro. Later, I even bent the lower line from the fuel pump to the fuel filter, too. Took two sticks of line to do that one, though, due to crimps which happened.
NOW, it is easy to just order things up. If you have a 383, then order a set for a '72 or so 400TQ application. IF you have a 440, then a similar 440TQ application. For good measure, you can get the lower and upper lines.
Considering the issues with ethanol'd fuels deteriorating rubber fuel lines FROM THE INSIDE OUT, having the OEM-style metal lines is definitely a good idea. Stainless steel braided lines? They still have rubber inside of them, so the same thing happens to them, too.
Just some thoughts and experiences,
CBODY67