Heres mine, this was in my old firebird. Took it to work, sprayed some of our degreaser on it, sprayed it off with a powerwasher, sprayed our engine shine and just let it sit. Not to bad...
Before...
http://img.photobucket.com/albums/v54/Jags4life/Jag/Car/new_wires.jpg
After...
http://img.photobucket.com/albums/v54/Jags4life/Jag/Car/cleanengine.jpg