soft brake pedal

i do have a small master and large volume calipers but the pedal should not fall.
what master did you end up using 1" or 1 1/32" ?
i have the 2 3/4 piston calipers in my duster with a 1" master and it is like power brakes.
..this system is the 4 piston Kelsey hayes which are larger volume and i am using 15/16'