On my 70 Challenger that originally came no power brake, drum brakes. Replaced drums with discs. Horrible brake action that required excessive pedal force to stop car.

Finally installed a very soft pad that helped,,,but ended with filthy wheels after very few miles of driving from brake dust.

After much investigation and complete BS from many “experts”, I learned that smaller MC bore increases braking pressure on discs than does larger bores. Sounds A*** backwards but is true. Found this cylinder, installed it,,,went to very clean ceramic pad, brakes are very good. Original drum brake MC was a larger bore.

Do not know if fits your Cuda,,,but you get the idea,,,,in this case smaller is really better

https://www.amazon.com/gp/product/B001PYO1PU/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1