40 tons? Those would be some mighty big ropes. The Grand Gallery has an Incline of about 26.2 degrees. The Kings Chamber has 8 estimated 40 ton stones, along with many others of lesser weight. I do not believe they lifted those stones into place. Better, if they slide them into place, as they built the Pyramid higher. Which, bears the question, if they slid them, how did they do that? I realize this is off subject, though I think I can safely say, the Kings Chamber is a fraud. Made to appear already busted into? By working it out in 3D, some interesting options come into play. I should probably start a different thread. Need to spend time on a new illustration, how to accomplish that.
Those AE were very cleaver.