HQ models that XX7 could be optioned on were:

0170 - 6cyl Belmont van
0180 - 6cyl Belmont ute
0270 - V8 Belmont van
0280 - V8 Belmont ute
0380 - 6cyl Kingswood ute
0480 - V8 Kingswood ute

HJ changed to a different model designation where 6cyl and V8 were the same model and engines became an option, so there were now only 3 x models upon which Sandman could be optioned (later only two when the Holden XU3/XX7 ute was dropped) :

M70 - Holden van
M80 - Holden ute (XU3/XX7 option deleted mid series)
N80 - Kingswood ute

HX and HZ only two:

M70 (XU3/XX7 dropped late 1979)
M80 (XU3/XX7 dropped early 1979)