Brake system problem 81 Camero Z28?
Check your equalizer in the back or middle of the car. And it also sounds like you have not bled them enough, or you are letting your reservoir get too low while bleeding and letting air get sucked in. And dirty brake fluid won't hurt unless it is like a cake or sludge like dirt amount. But it sounds like the equalizer also may have problems.
Dirty brake fluid is normally a sign that there has been moisture accumulated in the system.
sounds to me like you need to bleed the brakes again or the booster is starting to go bad.
