disc brake swap

[70challengerrt]

I have drums on the front of my challneger and was switching them to disc with the adapters from scarebird. I have to switch master cylinders because mine is frozen. Can I just use a front disc brake master and no proportioning valve or should I use a all drum master and a proportioning valve from like cordoba with disc?

[Chryco Psycho]

Use a Disc master , you need the extra capacity for the discs , you can use a proprtioning valve from a cordabe or any disc drum car or install a wilwood adjustable proportioning valve in the rear brake line to balance the braking