Is there a question there somewhere?
On the left (driver's) side of the engine the cylinders are numbered front-to-rear, 1-3-5-7; and on the right (passenger's) side front-to-rear, 2-4-6-8. So, you're telling us the #7 spark plug wire is arcing to the exhaust.
How much clearance (in inches) do you see between the wire and the header? Post a pic.