I'm trying to remove the cylinder head from an 850. The cam cover is off, cams out, exhaust manifold off. Couldn't get the intake manifold off but I assumed it would be helpful in lifting the head off once I get the head loose. All the head bolts are out but can't get it separated from the block. I had to leave it at the salvage yard like that. Panicking that someone might get it away from me after all that work!

I don't want to break the flange around the edge of the head. How do I do this?
Thanks for any help!