"Nothing special", he says... Fuck me, that's a fair amount of 'nothing special' there, dude!!!
I mean that in a sort-of 'impressed' kind of way, incidentally
As far as I know, the main difference with the American models is that some States require a mod to reduce the emissions.
I do know the wiring diagram in the Clymer manual differs from that in the Haynes one, and both of those (rather unhelpfully) also differ from the diagram in the official Yamaha Workshop Manual, so there may be some issues there. Many American bikes I've met seem to run with both the indicators permanently on, so you get these constant orange running lights. Not sure how they work when actually indicating for a turn, as I'm usually busy watching the road myself. Certainly that's where the wiring thing comes in.
That said, any bike mechanic worth his job title should be able to figure out the wiring on your bike anyway, especially if you tell him there *might* be a difference (stress the 'might', so he won't do his nut seeking a problem that doesn't exist).
But since yours sounds like a proper, pukka, boney-fidey Aussie model, I think you should be OK.
Certainly most basic components will fit, like starter motor and so on.
One thing, in case you didn't know, a number of people have said the starter clutch on their 1100 Draggies have failed, so that's worth bearing in mind.
Also, I don't know how you've done your mods, but there is a kit that relocates the oil filter so you don't have to take the pipes off every time you wanna change it!!