I did add new 15x10" wheels. You can see them in my trip thread from my New Year's Hangover Avoidance trip to S. Cal.
I have done some maintenance work (replaced fan & fan clutch, etc.) but that's not a 'build' item.
Upgraded from the stock plastic snorkel grill to a metal one from Expedition exchange but that's not a big deal.
There are some upgrades that I'll be buying in Australia and some I already have but still need to install but I'll wait to finish them before I post any more details..