One of the big things I don't understand is the different valves/blocks. If I have 12.19" 4 piston brakes in front and 11" 4 pistons out back, do I need any kinds of valves or could I run straight lines since they're all disc and the front rotors are bigger? How exactly does this work?
Designing a brake system isn't for amateurs! Brake system design is important and it requires some expert knowledge. The front to rear balance has to be correct or else you'll spin the car under hard braking. Typically on a nose heavy muscle car the front brakes will do about 2/3 of the braking and the rears will handle the other 1/3. That means the fronts need to have twice the brake force of the rears. So that is why the fronts have larger rotors and bigger calipers than the rear.
