Disc Brake Conversion, setup

[1968 Charger B5]

Changing my 68 Charger's brake. Car is originally non-power drum. I have the 73 a body spindles and appropiate bearings...my question(s) are

1. Cali/pads/rotors? Do i use 73 b-body?
2. Do I need a proportioning valve? If so, from what year/model?

Thanks
Rick

[Chryco Psycho]

no you use the 10.7 " dart disc assuming you have the matching caliper adapter , if you have the later Cordoba magnum adapters you can use the 12 " cordoba rotor