Hey Derek,
The plug in your bottom photo on the far left, is that insulator fully intact? It looks like its chipped... There also seems to be some black specs on it, which in a worst case scenario is a sign of detonation, it could just be oil though. Also, that plug looks to be running hot, but it could just be dirty. If you did not already spray that thing down with brake cleaner and see if that varnished look on the threads goes away. If not the plug is too hot. Only the first three threads should be discolored.