Fuel requirement from /6 to 440

RustyRatRod said
5/16 line will support 500 plus HP with a good pump and furl system. Chrysler used 5/16 on everything except the most powerful engines it made.

I'm well over 500 and run the 5/16 line.
A lot has to do with the power/rpm= what your doing with it...but mostly the 5/16 line is plenty good enough.

Op, the slant cars have the same fuel line diameter as the 340 cars and even b/rb.