Monday I was delivering mail for twelve hours, so I didn't get started until Tuesday.
I was planning on taking the motor out, but my friend objected and as it turns out, doing the head gaskets with the engine in the car is not anywhere near as bad as my reading had suggested, lol.
As suspected the gasket had a blowout on the cylinder with the lowest compression. It also appears that a previous owner has used stop leak or something resulting in a nasty buildup. Pistons and cylinders look great.
One of the exhaust valves on the bad side needs knurled, and the lash adjusters (I think?- the little pins on the ends of the rockers) have a lot of play in them compared to the other side, where they almost don't move when you push down on them.
Head has no obvious cracks but I will have it checked out by a machine shop when I find out if they can do something about the valves. Would it be easier to replace the rocker assembly?