Just an update Andrew. with the HJ tyre placards. You can update your info with this:

Pre 1976 6cyl XX7 Sandman Panel Van & Ute also non sandman panelvan and ute 9930172
Pre 1976 8cyl XX7 Sandman Panel Van & Ute also non sandman panelvan and ute 9930173
1976 6cyl XU4 or XX7 Panel Van & Ute 10cwt 9941013
1976 8cyl XU4 or XX7 Panel Van & Ute 10cwt exc. Aircon 9941014
1976 8cyl XU4 or XX7 Panel Van & Ute 10cwt with Aircon 9941015
1976 8cyl XU4 or XX7 Panel Van 10cwt 9941015
1976 6cyl XU3 Panel Van & Ute 14.5cwt 9930172
1976 8cyl XU3 Panel Van & Ute 14.5cwt 9930173

1976 6 Cyl Panel Van, Ute exc. Sandman 9942826
1976 8 Cyl Panel Van, Ute exc. Sandman 9942827

So the pre 76 HJ's had the same placard for both sandman and non sandman. This has only just been worked out over the last month or so.

Cheers
Jason