Factory Markings?? and 'Heavy Duty Air Cleaner'??

[83 WB_Ute]

Outback pack 6cyl cars had a heavy duty aircleaner.

Okay, didn't know that... haha Were they common??

Earlier Holden Air Cleaners were known as "Double Duty" as they had two elements. Not sure what the story was with this modern stuff.

I didn't know that one either!

Any ideas on the power steering box??