low brake pedal after conversion

[rodsandwheels]

Just converted 56 chevy to disc brake and power booster, cars will stop, but the brake pedal is low.
I am thinking either pedal needs to be modified or rod to brake booster need adjustment or rod between booster and master cylinder is not correct?

[badjuju342]

Could be proportioning valve and/or air still in lines

[Tailwind]

Are you saying the pedal goes to low when pressing on the brake or does it stay lower than it did even when at rest?

[85zeee]

On top of the other questions and assuming it turns out not to be air in the system......did you buy the conversion kit as a whole or did you piece it together?

[badjuju342]

Good point , an improperly matched Master cylinder will do things like that.