Break in question . burned paint?

Similar to individual exhaust gas temperature readings on a dyno. It’s probably overkill knowing that the tune up is probably lean with an out of the box Holley tune, but also curious just how close the two unburned pipes are getting to the ones with paint burning off. The coolant temperature concerns me because the plugs don’t appear to be getting up to their self cleaning temperature, especially if the engine is running lean. Those are equivalent to an 11 heat range in a champion plug, those may be a little cool for an aluminum cylinder head.