What disk brake upgrade for a 74 duster, not Wilwood

Hahha, its because my car isnt yet registered. It will be registered with either a Hemi or a turbo 318. So engineering company then tells me what they require to sign it off. Brakes, chassis stiffening etc and complying to the newer motor emissions if hemi. The engineering company build serious cars, st legal 1000hp cars etc etc. So they know what they are talking about. Not just a pen pusher. Then with their paper work i go down and register car. When girl at desk says no such thing as a hemi duster i hand paper work over. If hwy patrol pull you over your car has a mod plate so nothing ilegal about the car etc. I know you guys see this as control but also stops morons building some completely unsafe car and killing themselves or someone else.

Most states have inspection regs.

So once you make it through that inspection, couldn't you just do what you wanted?