This probably won't help, but a few years ago I removed a 5000 TD engine and didn't realize that I needed to remove the 3 bolts on the torque converter. I was able to do this because I used a Kubota to actually lift the engine out of the car. Anyway, are you sure there's no way to turn the engine over with a huge breaker bar or something? Maybe loosen/remove the main bearing caps to loosen up the crank?