What style fuel line is best?

my68barracuda said

For MoparDude 318, where your fuel and return lines pass through the front torsion bar frame, what did you use ?

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I'm using these stainless steel -8AN through the frame fittings.





Only place that make them are these guys:

Al Mooradian Performance - Your Best For Top Quality AN Hoses, Fittings, & Stainless Steel Racing Lines