help is this a sandman

[HK1837]

OK, not unusual to find them out of whack by that much but the chassis number is about 1000 too low.
Can you see 3 x numbers engraved/scratched into the back of the ADR tag? They can be hard to see.

67V is a common code for HX Holden and Sandman, so to be sure you'd have to check the body out.

[XX7SANDMN]

checked the adr tag carefully but no sign of any numbers on rear