Very interesting information, do the bolts on the camshafts have right handed threads, and do they turn the same direction? I think they do turn in the same direction. I hope the bolts do not pull the threads with them.
I took the valve covers off and I saw double chains, that was a good surprise as I was expecting the worst.
I will try to replace the seal and if that doesn't do the job I will tackle the guide on #8 cyl thats fouling up the plug.