Hard pedal

The calipers are the solid mount not sliding/floating ones. They are 4 piston. I think every issue that I have had you have helped me with nm9stheham. :D:DThank you. Also all you guys are great. Going to tear them apart just to count them out. Then new hoses, finally will tackle the MC situation. For mor fluid capacity couldn't I use an MC from say late 70's dodge truck. They are 4 bolt and bigger resivoirs? Or switch to a new 2 bolt MC from something with all disks?