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It has been said already in this thread, but I will pile on. High pressure lines, replace the line from metal connector to metal connector like the factory did it. For low pressure fuel injection or carbs, yea, a piece of rubber hose and some clamps will work fine.
On my 1986 El Camino I threw away the carburetor long long ago, and converted it to throttle body fuel injection. It was back in the days before the many kits that on the market now, so mine was 98% home grown my engineering. It runs at 7 PSI, so no major issues, even after 15 years.
For my 911 I came home one day after a short drive and the gas smell was very strong as I pulled into my garage. I looked around and saw a lot of gas dripping from the fuel pump area. Put it on the scissor lift, and it had a pin hole in the fuel line about 6 inches from the pump squirting a lot a gas. No choice for me, but do it right, and replace the line from the pump, to the connections in the engine compartment. And of course, "while I am in there" replace the return line as well. That was a major pain with the engine in place, but I did it right so I know if it lasts 30+ years like the original, it will outlast me.
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Glen
49 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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