Have an Edelbrock AVS2 650 CFM Carburetor on a Ford 351W motor. Put in an Evil Engery Carburetor Fuel Pressure Regulator - Adjustable 4.5-9 PSI. Set the Regulator for low pressure. Turned the key and watched the Pressure gauge start to spin round and round and fuel come out the carburetor vents.
I wouldn’t think should happen but it is. Is it as simple and I need to add a return line to the fuel tank?