Oakape, you are correct that I have no direct knowledge of what was done for the Ansett flight engineer panel.
What I do know, and have direct knowledge of, is that the primary change going from the 3 crew to 2 crew 767 was the incorporation of EICAS (Engine Indication and Crew Alert System). Basically everything that the flight engineer was normally expected to monitor was incorporated into EICAS. Boeing never certified or delivered the 767 without EICAS.
All those gauges and dials on the side panel are redundant to EICAS (I'm assuming most of those switches in that photo were moved to the pilot overhead, but again no first hand knowledge).