I believe I found the problem. I have been chasing this problem for a long time, so I removed the brake pedal, master cylinder, booster and linkage. The linkage was bent up and twisted. The booster was bad when I picked up the car, and I suspect someone drove it with a bad booster and stood on the brake pedal with both feet to get it to stop, bending the linkage. I straightened everything out, cleaned and lubricated all the pivot points, and reinstalled everything. I will bleed the master cylinder and wheels, adjust the brakes in the morning and hope this problem is solved. I'm pretty sure it will be good to go. Thanks for the reply's.
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