engine leaning out at 5000rpm?

[Jpr777]

I see you have welded a bung in your tank,
Good idea

[Jpr777]

Yes dragnet standard valve springs with upgraded cam

[Drag-Net]

What is the fuel/air ratio at just before it starts to break up? Stock 440 six pack and Hemi cars run 3/8 fuel lines and mech. pumps over 5000 rpm's with no problem.
They have more carb. bowls to keep full then a single four bbl. I would up grade the valve springs to the recommend ones the cam requires before getting to crazy with the fuel system.

[markz]

I see you have welded a bung in your tank,
Good idea

Not exactly a bung -its a 5/8" pickup at the back of the tank............
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