Removed the airbox cover and used a damp cotton towel to wipe down the hoses, wires, distributor cap, various gizmos, sheet metal, body structure, belt, fan shroud & blades.
Anybody could do this to their 911 engine, it is rewarding.
Looks a lot better.
Took about 2 hours, with many rinses, and a whole lot of dirt coming off.
Next time will wear nitrile gloves 'cause my hands were as black as the engine bay was.