pedal wont feel good with the booster but better than a small bore diameter master expleiing almost all its fluid with a long pedal travel like mine( if find it ok, its 3/4 to the floor, still bit longer than a stocker which was 1/2 way to floor)

I found moving up to 20mm rear slaves the biggest drama for my pedal travel and feel. keeping 17mm on rear and larger disks up front worked well, but fronts would lock before the rears, now more balance braking but slightly longer pedal travel. Stock twin master cyl