We have the same problem on our 64. The 1-1/32" master cylinder didn't stop the car hardly at all. Put a 1" on it and no difference. Went to a 15/16" and the car stops, but pedal effort is very high. My dad had manual drum cars that stopped better than this setup. Thinking of experimenting with different pads or going to the larger rotor (we have caliper brackets). Is there a larger piston caliper that might work better than the 70's A body?
