Always use anti-seize on your threads, just a heads up :D

http://www.renegadesclan.net/transfer/Plug.JPG
http://www.renegadesclan.net/transfer/Plug1.JPG
http://www.renegadesclan.net/transfer/Plug2.JPG

Ouch :( That's definitely one habit I stick to religiously -- steel threads and aluminum heads don't mix too well without the goop.

I use anti-sieze on any thread in aluminum.