Brake pedal not returning

[1985olds]

My brakes worked fine when I put the car away for the winter. The car is a 1985 cutlass with c6 fronts and c5 rear. I changed the bushing in the pedal where it pivots. The old one was very sloppy and loose, soninhad one machined to tighten it up. This was the only change to the brake system. When I drive the fronts stick after using them, tight enough at one point to lock them up. I thought it was the booster not releasing, so I replaced that yesterday. No change. I noticed that i can pull up on the pedal and release the brakes. I also loosened the pivot bolt on the pedal housing with no change. Anyone have any ideas?