Managed to hydrolock the #6 cylinder and bend a rod. When removing the head one of the head bolts broke about an inch and a half down inside the block. I will be trying to remove the remainder with an easy out tool tomorrow night but my questions are:

Are the head bolts torque to yield?

Has anyone installed a heli coil or similar device to repair the head bolt threads?

I'd sure appreciate any info. I searched a bit but could not find these items covered.

Mark