Fuel smoke and fouled plug

Small update. Got the valve covers and manifold off this morning. Good news is I have 915 heads. Bad news is whoever put this thing together used a super thick aluminum head gasket. Not bad on its own but when they put things together the extra space cause the valley pan and gasket to be misaligned. They also had a lot of permatex ooze out into the intake channels. From what I can tell this was causing both an air leak and possible picking up oil when accelerating hard. I’ll be putting it all back together (correctly) this weekend, put a new plug into #8 and maybe #2 and drive her for a while and see if things clear up at all.