I am jumping back in here.
IMO for a plug that has been through multiple dyno passes it looks pretty nice.
True being able to look down in the plug will tell you more at WOT, I use a lighted magnifying app on my phone rather then cutting the plug. As far as heat range we always wanted them burned two threads down, hell you're there.
Comparing the rest of the plugs will give you a bigger picture.
I would not get too wound up about your plugs until you get some street miles on them, as they will change.
I have had really good results with Autolite 63 plugs for the street.
