You won't know for sure what you need until you install and test it. There are a ton a variables involved that cannot be assumed or guessed at. pedal ratio, piston sizes, drum and disc sizes, vehicle weight, brake lining friction coefficient, tires sizes, their compounds and the list goes on.
You will likely need the residual pressure valves as previously mentioned

You can install an adjustable if your replumbing the rears or roll the dice and see if you need one