Ran a 3/8 supply and return fuel system

Over the weekend I replaced my sissy inline fuel pump with a Carter high volume/low pressure rotary vane electric unit mounted on the inside of the frame rail in front of the axle and level with the tank.
I also pulled the sender and drilled it for a return nipple.

Using 3/8 nylon 12 EFI hose I ran a complete new supply line and added the return line.
One thing I gotta tell ya is that you will need to insulate the lines because anywhere the lines touch the frame or body metal causes an amplification of the pump noise in the fuel.
The line literally vibrates and the nylon transmits that vibration to the car body like putting the needle on a record.

The first time I tested the new system the bare lines were following and attached to the outside of the subframe connectors and went between the front frame rails and firewall/floor metal.
I got in the car, turned the ignition on and the pump noise was so loud I just shut the key off and said OH hell no.
I'm sure it wouldn't have been near as a bad with rubber, as the nylon seemed to really transmit the noise to the car floor and body.
I went back and took it all loose then used foam pipe insulation tubing and covered the entire supply and return lines from the pump all the way to and including where they go through between the body and frame under the passenger side floorboard.
This made the pump sounds much more tolerable, and I can't hear it with the car running at all now.

The return is T'd off right at the carb inlet and follows the supply line back to the tank.
A one way flow restrictor in the return line puts my fuel pressure right a 5 lbs (should be about perfect) for a semi mild daily driver car.

I do have an A/F connected permanently in the car and you can bet I'll be watching it closely for awhile. :D
I did get a pressure regulator for it but couldn't see the point in adding it into the system if I have a max pressure of 5lbs and it would be adding another point to transmit noise to the car body unless I made rubber mounting mods to it like the pump has.
Not looking forward to those rubber grommets hardening up, so I will probably be watching for a quieter pump as time goes on.