[Lynn Eades]

Before you start hammering the pistons, light a diesel fire as I suggested before. The reason is that the fire will slowly heat the piston and in turn will expand the rings. As the rings heat and expand, they will move around the bore breaking free any rust that is bonding them to the bore. So, use a small amount of diesel. It won't burn without something like a bit of rag in there. As the last of it burns, is when most of the heat will travel through the metal. It takes time to generate the heat. Once that's done a bit of light oil in the bores to soak for a while will help. Maybe after that, a judicious pry both ways might get things moving. You will feel better about your bores and pistons if you are not trying to hammer the snot out of them. Take your time. good luck.