Recommendations for Clutch, Pressure Plate, and maybe Flywheel

Car is a 70 340 Duster....Pretty much stock. I used to have a non mopar muscle car I installed a dual friction clutch in....It worked great but it was very different in the amount of pressure needed to depress it....It was very easy. What would the correct diameters be of correct clutch disc size and flywheel in case mine needs to be replaced.