Agree with Byron this is a interesting one for me too:
HJ XU4. What is the GVW for any variation of these? Anyone ever found one?

Mine would be:
1. Excess parts where they used up on newer models. Eg, GTS Guards.
2. Where there any HX with RTS suspension. (I have heard many differed opinions)
3. Did the HX V8 use an air cleaner sticker? Many conflicting suggestions from "experts"
4. 63V Trim on a HZ Base Model (M) Ute or Van means 99% sandman???? (something a few old blokes have told me)

#4 I think I spoke to you Byron about once. But its something that always interests me.