4 wheel disc brakes, Proportioning valve? Residual valves?

Hey I’m looking for some advise, I have a 65 valiant and one of the first things I did was went to a 72-74 dart style disc brake up front with a matching master cylinder. I have recently changed the rear brakes to a summit GM style disc brake kit. I will be upgrading the front suspension and front disc brakes (wilwood) and was going to replace the brake lines while it is apart. Now one thing I haven’t touched or added is a proportioning valve or residual valves for the vehicle now having 4 wheels disc brakes. Can someone lead me in the right direction?