Home/1964-73 Mustang Pumps and Regulators WMS 100 psi Fuel Pressure Gauge and fitting $35.99 Fuel Lines, Fittings and Adapters Call Holley Fuel pressure regulator, EFI, -8 Feed, -6 return $249.99 Holley Fuel Pressure Regulator EFI, -10 feed/ -8 return $248.03