Big brake upgrade for a 1971 dart with original KH front discs

Looking to upgrade the brakes on my 1971 Dart which has original front discs with KH calipers.
There are kits for drum to disc available but i haven't found any disc to disc. As I'm planning a gen3 hemi swap i need bigger brakes to get it approved with the higher power output. So I'm looking for 12in + rotors.