Need engine help and advise

[brisboats]

I was going to suggest you decarb the head and cylinder tops while you have it apart but that looks clean enough to leave alone. You could now spray some PB blaster directly on the rings though just to loosen them up. I would get the headgaskets and button her back up and recheck compression. I bet you are going to be pleasantly surprised. Get her healthy on all six and I can find your lost spark.

Brian