Looking for a firm brake pedal

My 9 inch brakes worked as good as they could I switch to 10 all the way around and now it seams like it takes more pedal to stop. All air is out of lines, Im just wondering what I can do to get the firm pedal feel back. Possibly master cyl, manual brakes. I dont understand the diff between the diffrent bore or rod size so be patient with me. Dont get me wrong the 10 inch brakes stop the car they just dont have the feel Im looking for.