At some point, if the engine doesn't come loose with all this monkeying around we've been putting you through. The engine is going to have to come apart so you don't bust or bend parts.
Like Jerry said, after you spray the valves and springs, "tap" them with a hammer to make sure the valves will move. Let the penetrants to do their job. Let it sit for a day or so after spraying into the spark plug holes. How well your penatrant works may depend on what, and how much you may have already used and what is in the cylinders already. It may not work as well is you have already put oil in them. Leave the truck in high gear and every time you walk by the truck, try to rock it forward and back. Keep trying.
If this engine is stuck pretty good, you might want to really think about taking the push rods out too. If the valves move down and stick in the open position, and then you start to get the engine loosened up and turn it over, you could end up bending a valve.
IMHO, I don't feel you have to work real hard to break loose the engine. If you do, you are probably better off at least removing the head to find out how bad the pistons are stuck. Maybe then go for broke and yank the engine.
Also keep in mind that the test I did with PB and KROIL was on an engine that would need complete rebuilding. It was stuck! IMO when the pistons need to be beat on with a 2x2, it's too late.
We are trying to help, and we are interested in you being successful, so don't get discouraged. I feel really good after I figure out something and/or accomplish a task like you are doing.
Let us know how it is going and keep asking questions.
...and Jerry (Hotrod Lincoln) is the man in the know....as far as I know.
