I'd give it a 50/50 chance. The only things on (or not on) a HQ Kingswood Sandman ute that were not standard or not option-able on a HQ Kingswood ute are:

Sill stainless strips deleted from Sandman.
Sandman had fluted guards.
140mph/225kmh speedo (Kingswood when optioned with sports instruments got 120mph/200kmh speedo).
Console shift standard in Sandman - Kingswood optioned with buckets and 4spd was floor shift only (no console available).
Satin blackouts on lower body as mentioned, and headlight surrounds blacked out.
Sandman got SS grille.
Sandman got horn cap with insert hole with unique Sandman insert.
Stripes were dealer fit so they were there or not depending upon taste. 1870 (Sunburst metallic) got XX7 (black) stripes if fitted.

VIN for the car is 8N80TDJ431226Q - you already provided it in the text.