I agree that it sure looks like oil is getting in the chambers. When I pulled the plugs for a check at 500 miles, the threads were wet with oil on several of them and they looked like crap. I have a pic in post #121 but here's a bigger and better one. The plugs are in order 1-6 from L-R. I have the second set of plugs that ran for the last 200 miles, I'll get a pic of those later today.
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The head was redone with all new valves, guides, and seals along with porting and an oversize valve job. Is is possible that stuff could leak when it's all new? I will double check the rings and ring grooves. These also were all new, but I'll check them anyway.