I'm with Dodgy,although not up to speed on the Aus.dealer ordering process.
I think the biggest problem with all but the well trained eye is that none of the B10's came into the country with actual build dates stamped onto them(like now days)you could suss it out by chassis number sequence etc.but to the casual observer they would'nt have a clue but lots are experts if you know what i mean.
The only major/minor differance between all KB10's was the colour you chose,and yes no auto's till the long tail light model sedans.

Long live the thou