Opinion on this Spark plug reading.

512Stroker said

How many miles on that plug?
What fuel are you burning?
Street or strip?
Those black deposits on the insulator would indicate a rich condition on the top end.
Looks like your a little shy on timing - more advance
This my help, it's pretty good plug info
Reading spark plugs

Click to expand...

Plugs have less than 25 miles on them. Fuel is 10% ethanol rated at 91 Octane. Street motor, but I rev it to 5800 all day long.

I am thinking on a fresh set of plugs this week and do a good pass and kill the engine and pull a plug for a more accurate reading. I was, and I am curious what others thoughts are by posting the pic above. I am going to read the link you posted. Thank you