Plug read, opinions needed

[TT5.9mag]

Not a lot to add really because I’m still building the new trailer for the boat and the engine is still on a pallet but I noticed something in another thread that caught my eye. In the thread @Rat Bastid started,
Excellent video
About Steve Morris showing a plug read from his giveaway big block, his plug has the exact same mark at the tip of the ground strap that 3 of mine did.

This is the best screen shot I could get. Anyone else notice that?

 

[TT5.9mag]

Just thought I’d update my thread. Truck is built, trailer is built, and the engine is in the boat. I have some wiring to finish for the dual wideband o2, and tubing to run for the boost gauge, then it’s finished. Can’t wait for spring time.