Thanks Larry,
This problem sure is elusive. No fluid was seen at the booster when MC was removed. Matter of fact, we saw no fluid at any visual point on the system. No fluid loss visible at the MC reservoir. MC was suspect as I had no problem pushing down the pedal without engine running, and of course effortless with the engine on. There should have been some resistance with the engine off.
Rebuilt M C is also suspect in that nothing changed after install. Bench bleed also did not satisfy me. Thus, I am replacing it tomorrow.
Probably going to consider power bleed of the entire system after successful bench bleed of the MC and installation. Nothing was done to the brake system at all prior to the first indication of pedal problems. All pads are in very good condition. This vehicle only has 35K on it. (Pretty nice for an '86). Mileage aside, I have had my share of problems surfacing due to deterioration of rubber hoses, etc. mainly on the vacuum systems. Only other problem was the ignition sensor mounted on the trans. (A real task to replace). I am sure with all the Forum fellows, we will lick this problem too.
Thanks again.