I have a brake problem on my '76 chevy 4x4 1/2ton. With the engine off
there is good pedal feel, but with the engine running there is no pedal.
The previous owner said it has been like this for a while.
Here is what has been done to the truck. 455 olds motor, the 203 'case
has been converted to part-time w/ warn locking hubs, 14 bolt rear
w/5000lb air bags
Here is what I have done; new master cylnder, and rear disc brake
conversion, I have also flushed the and bled the system counless times.
Could the brake problem be the booster?