I can't advise on rear disc and front drums, never tried it and generally not recommended.
In mounting your MC consider putting it under or even behind the cab wherever is enough room, and use a long pushrod from the original pedal.
If you won't be using PS then a common vaccum booster and MC is a great choice. Don't need hydroboost if you won't have a PS pump.
Depending on the MC and proportioning valve you use either may include residual pressure valves. If you need individual ones then 10psi are for drum brakes and 2psi for disc brakes.
I used a standard brass GM style proportioning valve (2 inlets 3 outlets) and also used a pair of 2psi residuals, MC is under the floor.
