Boyd Center Fill Tanks

[bfr57]

Done a bunch of research on Boyd's fuel tanks and all have positive reviews, but not seen anybody mentioning the center fill option that I see on their website. Anybody have that option? Wandering if that would allow me to use the flip-down license plate option in the bumper like the people using the Camaro tank option are doing with Boyd's center fill tanks? I don't want to use the Camaro tank as I have a K10 with leaf springs and don't want it hanging that low.