I think the head is fine. I did reuse the head gasket, I’ve gotten away with it on other vehicles.
I haven’t had the cooling system tested.
The garage I took it to, to have the codes read had the tool. It looked like the board UPS drivers use, it plugged into the port in the engine bay. He wouldn’t tell me exactly what it said. I believe he wanted me to leave the car at his shop so he could do the repair. He just said it was related to the head/head gasket.
It did have a vapor lock because the heater would blow warm then cold air. I raised the overflow bottle about a foot above the engine to get the air out, it was on wheel ramps. I did not rev the engine to 1500-2000 rpms.
I used new headbolts which I lightly oiled. I did exactly as you stated in the older post. I also used the Bently manual for the proper order/tightening sequence.
I will take the plugs out tonight and get a photo of each one, probably within the next hour.
I’ve waited 3 months with this car so far. I’m willing to wait a little bit longer if you can look at it for me. You’ve been a great help in this learning process for me.