Helpful hint for installing plugs:
Install the spark plugs using a small section of rubber hose, instead of a socket on an extension. If the spark plug starts to x-threads the hose will slip on the plug, whereas the socket and extension wont. Also torque them to 13ft lbs, not hand tight, over tightening them is an easy way to screw up the aluminum threads.
Good info, you forgot one thing, apply anti-seize to the threads on the sparkplug. Dissimilar metals like to corrode.