Front and rear disc brake swap help needed.

I am in the process of making a bunch of upgrades to my son’s 67 Dart and I got some questions. The car is a slant six, with a 7.25 rearend and drum brakes. I am swapping in a 360 magnum and an A518 transmission. I’m also swapping in front disc brakes from a 76 valiant and an explorer 8.8 rearend with disc brakes. The valiant did not have power disc brakes. Can anyone tell me what master cylinder I need for this set up? Can I add a brake booster. I’m assuming an adjustable proportioning valve is the way to go. Any help would be appreciated. I’m supposed to have this car ready for his HS graduation so I need to get busy. Thanks.