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Working on a friends challenger with a 572 all aluminum hemi making 805 hp at the crank. I am going to run -10 feed and -8 return for the fuel supply. Currently the car will be set-up on carbs but will eventually be converted to EFI. Question is, what should I use for fuel line? I'd prefer .028 wall stainless but is that practical for a fuel line that is 5/8"? What do you guys recommend and or use yourselves? I do NOT want to use braided stainless lines. Thanks in advance!
 

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return needs to be same size or larger than feed. i have seen issues with this and have experienced it myself. in some cases you will not be able to adjust the fuel pressure to your liking due to more fuel comming to the regulator than you can send back. it all depends on the pump, but id guess youve got something pretty stout for that motor.
 
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