These aircraft hark back to the days when the captain was an old grey haired gentlemen, there was no CRM, and the ergonomics were totally crap, but they were the latest and greatest.
I remember as a kid I flew in them on occasions which was a very big thrill. I have since worked on them and they are built like the proverbial brick dunny but with the post war electrics in them, as the 580 conversion was a simple (I use the term loosely) engine replacement which gave it double the original horsepower. Nothing else was changed. They are the FX Holden of the skies.