Will my fuel line size be sufficient?

[Pman1961]

I have a Superformance with the factory steel tube fuel line. Appears to be 3/8" o.d. Will the factory line be sufficient for a 555hp 408 windsor or while the motor is out would it be a good time to increase the size? If so...what size do you recommend and would you rerun steel line or use steel braided all the way? Also, routing. Same as factory Superformance or I'm up for suggestions and photos if possible? Thanks

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I have very similar power ratings on my 418W in my SPF and have had no problems with high end fuel delivery for 8 years using factory size and fuel line routing.

[mdross1]

Same here, been running big blocks for years with 3/8" line never one problem running out of fuel.

[Pman1961]

Thanks....that is the news I was hoping to hear. I figured with all the engine combinations available that the fuel line should be good to go.