I just bought a tanks inc setup for my Coronet 5.7 conversion, will be a long time before I see how quiet that is. I have a walbro 255 hanging off the frame rail on my 70 Fury (EFI, turbo) and that thing gets loud after running for a few hours down the road. Don't really hear it in the car, but if you're outside the car standing next to it you definitely know it's there. Been that way since 2009 no issue.
I had the 255lph intank when I was still carbed & it was loud, this big pump you can hear the fuel flowing through the bypass regulator at an idle,
