This might help re times to travel. Get a BIG map and see where you want to go to
https://www.aboutaustralia.com/travel-tips/best-time-to-travel-to-australia/
http://www.outbackcrossing.com.au/Touring/The_Best_Time_to_Travel_Australia.shtml
https://news.experienceoz.com.au/when-to-visit
Some idea of temperatures /rain in Darwin at different times of year http://www.weatherzone.com.au/climate/station.jsp?lt=site&lc=14015 and Alice Springs http://www.weatherzone.com.au/climate/station.jsp?lt=site&lc=15540
If time permits also try and see The Olgas or Ayers Rock...
Your design would fail I believe with all your welds at the front of your box area. You need to have an A frame design going as far back as possible.
Look at a design like something along the chassis design on this site http://www.trailerplans.com.au/?page_id=405
You can build whatever sort...
The Defender name was not adopted until 1990 as a measure to distinguish the utility Land Rover model from the Discovery and Range Rover. Between 1983 and 1990 the coil-sprung utility Land Rovers were officially known as the Land Rover Ninety or One Ten.
Before 1983 it was the Series 3. No...