The brake pedal on my Coronet has very little modulation. The pedal seems a little low, but all I have to do is breathe on it and it locks the fronts. I swapped to A body slider calipers and replaced the booster with a NAPA replacement that looks like the Midland Ross with the clamp around it. MC is either 1" or 1 1/8. As soon as I touch the brake pedal it almost feels like it gets sucked down. Could the booster be bad or wrong size?