The F-4G used the F-15 style 600 gallon high speed tank. It could be carried on three stations on the F-15 and only the centerline station on the F-4G. The only difference was the fuel stand pipes were located further forward on the ones used by the F-4G.
Yes, they are the correct type of tank. Fuel stand pipes are round pipes that extend from the tank up into the center fuselage. One carried air into the tank and one fuel from the tank into the centerline fuel manifold. The fuel stand pipes wouldn’t be seen very good in 1/48 scale. Of note, the tank did not fit flush with the fuselage but hung down about two inches on the real aircraft, so leave a small gap when installing it. The aft sway brace was the same as used on the F-15 tank with a sway brace mount attached to the keel section of the aircraft.