Cusser
+1y
If I remember mine from almost 4 years ago, there are the 10 big bolts that hold the cylinder head to the block. I did have a rubber mallet, and mine was original condition from late 1987 manufacture, so 24 years on there, and mine wouldn't budge either.
So I actually called Axel Breaker Earl on the phone, and he told me to re-attach the rear engine hanger/mount (used to remove the engine) to the cylinder head and tap on that, and that worked for me.
So I deemed him Saint Axel Breaker Earl for that.