I'm trying to learn to read my spark plugs

[Maddog20]

Success! I pulled timing and added fuel. plugs looked good, there was a nice fuel ring at the bottom, a nice timing mark, and the plugs I had in there for a while showed discoloration on the threads. I had the 6's in there and there is 3-4 threads discolored, so I threw in some 7's and I am going to see how they look in a little while. One thing I noticed is that the discoloration goes further down the threads on the opposite side of the ground strap.

good deal Post a pic of the plugs!