Stuck 440, Need Help !!!

I had this problem on my old 383, I used a lubricant called rust buster, and sprayed it around the pistons on both sides of the piston. Soaked it on top and shot it around the piston from inside the block. After a week of spraying I was able to knock have of them out, and then I could finally turn the crank to get the others out. A 30 over bore was required to clean it up after that.