Too much vacuum?????????

[Don Savard <res03r3f@xxxxxxx>]

Hi all,
  Working on brakes to get my 66 Crown Coupe roadworthy. Rebuilt wheel
cyliders fore and aft.
 Relined brake shoes,new brake holddown hardware, new self adjuster
hardware all around and rebuilt master cylinder. Pressure bled brake
system. Now have very high and very firm brake pedal.
With the engine running I apply the brake pedal and it goes to about 1/4
inch from the floor-not much room for error.
 The questions are:
  Too much vacuum??
  Vavuum overpowering the master cylinder??
  Bad master cylinder(it does go back to hard and high with engine
off)???
  Bad check valve(how do you test it?)???
  Something else I overlooked???
  Is there a restricting orifice on rear lines to engage front brakes
first???
 Any and all thoughts are greatly appreciated.
Don Savard(looking for a break!!)

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64 Crown 4DHTP       64 Crown Coupe
65 Crown Coupe       66 Crown Coupe
71 Dodge Dart Swinger 340 (clone)
96 Dodge Dakota