Removal of the plug in the Water Pump on BB???

[tex_waco_usmc]

Got the BB fired up and running on her on free will! Gas in the tank and good battery and some adjustments on the carb and BAM! she drove around the farm, no bed and no drivers side door! LMAO

Then I noticed the heater core return line was not hooked to the motor at all! The P.O. stuffed a capped chrome lugnut in the end of the heater hose and put a hose clamp on it... (I swear I heard banjo's playing when I saw this!)

I tried to remove the plug in the water pump to put the correct fitting in and make it the way it is supposed to be but I cant get the thing to turn it is almost as if someone has welded the plug in. Does anyone know any tricks to getting this thing out???