New to Mopar with a Few Questions

Welcome to MoPars. We are strange but good people. Honestly it looks like the car is very pretty. Not sure BUT you can change the master cylinder to one with a larger bore/ piston and get better braking pressure.

You should find a complete system if you decide to go that route. A kit that includes a matched system. Master, booster and calipers/ rotors. I can only reference factory swaps from small to big bolt pattern disk brake swaps. May not be the road you want. Again nice looking car. Looks like you have a few nice rides in the stable.