Removing DePersia Bailer

I have a 1975, (red, white, and blue)built for the bi centennial. I am trying to keep as original as possible.
The bailer is frozen. I have been trying to loosen it with PB Blaster, to get it on to my work bench to see if I can loosen it.
Also, have not gotten anything to budge, the lock nut inside the cockpit seem frozen too. Any suggestions, to get this out or to work correctly?