After some more finagling, I got the engine to slide forward and down a little bit. But it's not much. Can those of you who've done this before, verify for me if this is what you were working with?
In this picture, you can see where the engine mount on the cylinder head was. I removed the triangular support bracket. The engine is supported now only through the swingarm bolt. It rotated a little bit, it moved maybe 1/2" forward, 1/2" down.
The question is: is this enough to start pulling the head off? It seems pretty tight.
Thanks for any assistance you can offer!