Fuel hose AN6 or AN8

It does not matter what size line you want to run you still need a return after the carb and a regulator on the return. You cannot control the feed pressure if you have a open return after the carb. A return regulator is used for this.

A street car needs this more than a race car. I installed the return when I was having flooding issues on restart when hot. The hot vapors from boiling ethanol play games with the needle and seat. The cool constant flow of fuel not being dead ended under pressure at the carburetor means a whole lot. I could not believe how much more crisp my car was when I installed this return. Also tap the key when hot it fires and idles. No clearing the hot fuel out to get the needle working properly.

For a while there I was starting the car with the pump off after the car was warmed up . Then I would turn it on and off until the needle would work properly. and the car would idle.