70 Dart factory disk brakes

I everyone, Im new to the forum and have a noobie question.
I want to upgrade the factory disk on my dart but everything I can find is a conversion.
Can someone please tell me what I need to do? Can I use a conversion? Is there a kit out there for factory disk cars? Im really stuck.
Thanks for all your help. Cheers

The 4 piston Kelsey Hayes brakes that are factory for your car is a great system. The only draw back is if you want to go to large bolt pattern but there is even a solution for that at the link below.
Using Mustang Rotors to obtain 4.5" bolt pattern on Kelsey Hayes Brakes