DR. DIFF 11.25 rear Disc Brake Kit

What are you using up front to match these big rear brakes? Maybe 13" with Viper Calipers or something massive like that?

Fronts are currently 11.75 Mopar big brake rotors off of a Cordoba, pin type calipers, and a Mopar performance manual dual reservoir master cylinder. Car was an original power disc brake car up front with rear drums, so I am still on the stock metering block.